Journal articles: 'Roses – Control'

1

Schulz, D. F., and T. Debener. "DOWNY MILDEW IN ROSES: STRATEGIES FOR CONTROL." Acta Horticulturae, no. 870 (July 2010): 163–70. http://dx.doi.org/10.17660/actahortic.2010.870.21.

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Grinstein, A., Y. Riven, and Y. Elad. "Improved chemical control of botrytis blight in roses." Phytoparasitica 25, S1 (March 1997): S87—S92. http://dx.doi.org/10.1007/bf02980335.

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Pasini, C., F. D'Aquila, M. Amoretti, and G. V. Zizzo. "CONTROL OF POWDERY MILDEW OF ROSES IN GREENHOUSE CONDITIONS." Acta Horticulturae, no. 751 (August 2007): 247–49. http://dx.doi.org/10.17660/actahortic.2007.751.31.

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4

Evans, R. Y., and M. S. Reid. "CONTROL OF PETAL EXPANSION DURING DIURNAL OPENING OF ROSES." Acta Horticulturae, no. 181 (March 1986): 55–64. http://dx.doi.org/10.17660/actahortic.1986.181.5.

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5

Munmun, TS, MJ Alam, M. Islam, NU Ahmed, MH Polash, and NU Mahmud. "Integrated pest management approach to control thrips of roses." Progressive Agriculture 31, no. 2 (December 16, 2020): 89–93. http://dx.doi.org/10.3329/pa.v31i2.50713.

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The experiment was conducted at established rose garden of Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Jashore during 2017-18 and 2018-19 winter season (November-April). The experiment was laid out in a RCBD design with three dispersed replications. Four treatment combination were as follows: T1 =IPM package-1: Mechanical control + Sticky trap (Blue and White) + weekly spray of Azadirechtin (Bio-neem plus 1EC) @ 1.0ml/L of water, T2 = IPM package-2: Mechanical control+ Sticky trap (Blue and White)+ spray of Thiamethoxam 20% (Virtako 40SC) @ 1.5 ml/L of water, T3 = IPM package-3: Mechanical control+ Sticky trap (Blue and White)+ weekly spray Chlorphenapyr (Intrepid 10EC) @ 1 ml/L of water and T4 = Farmers practice: weekly spray Imidacloprid (Imitaf 20SL) @ 0.5ml/L of water. For mechanical control hand picking was done and harmful insect also classified as the most direct and the quickest way to remove clearly visible pests. Two color stiky trap (white and blue) were set up in each line. The lowest number of rose thrips was found in IPM package 2 (6.36 in 2017-18 and 3.03 in 2018-19) and highest in farmer’s practices (14.36 in 2017-18 and 12.40 in 2018-19). The lowest percent flower infestation of rose was recorded in IPM package 2 (9.98 to 17%) and the highest in Farmers practice (19.72 to 32.66%). The highest yield (864000 no./ha in 2017-18 and 535932 no./ha) was recorded from IPM package 2 and the lowest in farmers practice (438750 no./ha in 2017-18 and 388857 no./ha). The results revealed the highest MBCR was observed in IPM package-2 (Mechanical control+ Sticky trap (Blue and White) + spray of Thiamethoxam 20% (Virtako 40SC) @ 1.5 ml/L of water.) treated plot (17.2 to 49.7) in both the year. Finally, it may be recommended that IPM package 2 is very much effective to control thrips of rose as well as high yield and more economic return. Progressive Agriculture 31 (2): 89-93, 2020

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Lindquist, R. K., M. L. Casey, T. Moore, and R. A. J. Taylor. "Control of Western Flower Thrips on Dwarf Roses, 1995." Arthropod Management Tests 21, no. 1 (January 1, 1996): 359–61. http://dx.doi.org/10.1093/amt/21.1.359.

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Almeida, Elka Fabiana Aparecida, Ariane Castricini, João Batista Ribeiro Reis, Leandra Oliveira Santos, Maria Geralda Vilela Rodrigues, and Guilherme Brito Souza. "Postharvest aspects of roses." Ornamental Horticulture 23, no. 2 (June 27, 2017): 160. http://dx.doi.org/10.14295/oh.v23i2.990.

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This study aimed to evaluate respiratory activity, color changes and fresh weight variation of ‘Carola’ (red), ‘Avalanche’ (white) and ‘Avalanche Chá’ (tea) roses for seven days after harvest. Respiratory activity, coloration of petals and fresh weight loss were evaluated. Treatments were composed of three rose cultivars and seven days of evaluation, in a 3 x 7 factorial and a completely randomized design with four replicates of two flowers per plot. To determine the respiratory activity, in addition to the four replicates, an “experimental control” was used as a fifth replicate without roses. ‘Avalanche’ and ‘Avalanche Chá’ roses with petals of similar luminosity showed no browning during days after harvest, but are distinct in terms of chromaticity. ‘Carola’ rose has less shiny petals. On harvest day, the respiratory activity is elevated and reduces later until the fourth day, in which there is elevation of this parameter again coinciding with high fresh weight loss. During days after harvest, small changes in the color of petals were observed; however, the main changes were observed in respiratory activity and fresh weight loss.

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Parolin, Pia, Cécile Bresch, Gauthier Ruiz, Nicolas Desneux, and Christine Poncet. "Testing banker plants for biological control of mites on roses." Phytoparasitica 41, no. 3 (January 25, 2013): 249–62. http://dx.doi.org/10.1007/s12600-012-0285-6.

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9

Phillips, D. J. "Postharvest Control of Botrytis Rot of Roses with Carbon Dioxide." Plant Disease 69, no. 9 (1985): 789. http://dx.doi.org/10.1094/pd-69-789.

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10

Redmond, J. C. "Biological Control of Botrytis cinerea on Roses with Epiphytic Microorganisms." Plant Disease 71, no. 9 (1987): 799. http://dx.doi.org/10.1094/pd-71-0799.

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11

Roberson, William E., H. Brent Pemberton, and George L. Philley. "CONTROL OF BLACK SPOT ON ROSES WITH CYPROCONAZOLE USED AS A DRENCH." HortScience 30, no. 3 (June 1995): 439b—439. http://dx.doi.org/10.21273/hortsci.30.3.439b.

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To determine the efficacy of cyproconazole for control of black spot [Marssonina rosae (Lib.) Lind] when applied as a drench, treatments of 0, 32.5, 65, 97.5 and 130 g a.i./ha were initiated 9 May 1994 on individual Rosa `Peace' plants in a randomized complete-block design. Treatments were applied once per month until 18 Oct. 1994. Data were taken in July, Sept., and Nov. 1994 when separate disease and defoliation ratings were assigned. By July, the controls were heavily infected; the higher treatment rates resulted in significant control. By September, the disease and defoliation ratings exhibited a linear response with cyproconazole rate, with the highest treatment rate giving the best control. The relationship between disease and defoliation ratings and treatment rate remained the same in November, although there was increased disease incidence overall. No phytotoxicity was observed. These results indicate that soil applied treatments of cyproconazole can control black spot effectively on roses.

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Hagiladi, A., and O. Ziv. "Use of Antitranspirants for Control of Powdery Mildew on Field Grown Roses." Journal of Environmental Horticulture 4, no. 2 (June 1, 1986): 65–68. http://dx.doi.org/10.24266/0738-2898-4.2.65.

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Izumi, Hidemi, and Atsuo Fujii. "Vase Life of Cut Rose Flowers Harvested at Different Months and Treated with Poly(2-Hydroxypropyldimethylammonium Chloride)." HortScience 33, no. 3 (June 1998): 486e—486. http://dx.doi.org/10.21273/hortsci.33.3.486e.

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Flowering rose (cv. Rote Rose) stems, harvested at different months of the year, were placed in 250 ppm poly(2-hydroxypropyl-dimethylammonium chloride)(PHPAC) solution or in water as the control at 4 °C for 24 h. They were then transferred to water and held at 20 °C for 6 or 7 days. Bent-neck of control roses was the greatest with those harvested in July, least with December or May harvest, and intermediate with October harvest, and occurred after day 2, 4, 4, and 3 at 20 °C, respectively. PHPAC reduced the occurrence and degree of bent-neck of all roses and had the greatest inhibitory effect on roses harvested in July. PHPAC accelerated flower opening of roses harvested in July and December. Rates of water uptake and transpiration decreased during the holding period, and PHPAC retarded the decrease after day 3-4 of all roses. Hydraulic conductance in the basal 3 cm segment of all rose stems decreased during holding and PHPAC retarded the decrease. Electrolyte leakage from the basal 3 cm of the stem was greater with the PHPAC-treated stems than that of the control of all roses. These results indicate that PHPAC suppressed bent-neck probably by reducing the rate of decrease in water uptake and transpiration, which related to the hydraulic conductance and electrolyte leakage in the basal 3 cm of the stems.

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Wurms, K. V., and J. D. Hofland-Zijlstra. "Control of powdery mildew on glasshousegrown roses and tomatoes in the Netherlands using anhydrous milk fat and soybean oil emulsions." New Zealand Plant Protection 68 (January 8, 2015): 380–88. http://dx.doi.org/10.30843/nzpp.2015.68.5816.

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Powdery mildew (PM) is a very serious disease affecting glasshousegrown roses and tomatoes in the Netherlands Control is limited because of resistance to existing fungicides Anhydrous milk fat (AMF) and soybean oil (SBO) emulsions were evaluated for control of PM in roses and tomatoes Both AMF (14 g/litre) and SBO (14 g/litre) provided powdery mildew control on rose leaves and blooms that was significantly better (P

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15

Lin, Xiao, Rudy R. Negenborn, Mark B. Duinkerken, and Gabriel Lodewijks. "Reducing Unmet Demand and Spoilage in Cut Rose Logistics: Modeling and Control of Fast Moving Perishable Goods." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 9 (August 31, 2018): 130–40. http://dx.doi.org/10.1177/0361198118783901.

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Fresh cut flower supply chains are aware of the need for reducing spoilage and increasing customer satisfaction. This paper focuses on a part of the cut rose supply chain, from auction house to several end customers. A new business mode is considered that would allow end customers to subscribe to florists and have a continuous supply of bouquets of roses. To make this business mode feasible, we propose to benefit from real-time information on roses’ remaining vase life. First, a quality-aware modeling technique is applied to describe supply chain events and quality change of cut roses among several supply chain players. Then, a distributed model predictive control strategy is used to make up-to-date decisions for supply chain players according to the latest logistics and quality information. This approach provides a tool for multiple stakeholders to collaboratively plan the logistics activities in a typical cut rose supply chain based on roses’ estimated vase life in real time. The proposed approach is compared with a currently used business mode in simulation experiments. Results illustrate that the new business mode and the planning approach could reduce unmet demand and spoilage in a cut rose supply chain.

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Manfredini, Guilherme Mariano, Patrícia Duarte de Oliveira Paiva, Elka Fabiana Aparecida Almeida, Ângela Maria Pereira Do Nascimento, Thaís Silva Sales, and Leandra Oliveira Santos. "Postharvest quality of essential oil treated roses." Ornamental Horticulture 23, no. 2 (July 11, 2017): 192. http://dx.doi.org/10.14295/oh.v23i2.993.

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The loss of commercial quality during storage and transportation of roses is one of the factors that reflect on production costs, leading producers to preventively apply harmful chemicals, mainly to hamper Botrytis cinerea development and reduce further losses. An alternative to increase flower longevity without contaminating the environment with harmful chemicals is the use of natural products, such as essential oils, which have fungistatic and insecticide properties, as well as low toxicity. The objective of this study was to evaluate the effect of essential oils on the vase life of Rosa cv. Avalanche: 12 treatments were tested, resulting from the combination of 5 types of essential oils plus the control in two cold storage periods (2 to 6 days) at 1 °C, 90-95% RH. The essential oils tested were eucalyptus, cinnamon, lemongrass and peppermint (1%), clove (0.1%), plus a control with distilled water. Application was made by spraying the flower buds. After storage at low temperatures, the flower stems were kept in a room (16 °C, 70% RH) during 10 days for evaluation. Flower stems stored for 2 days in a cold chamber showed better means for darkening, turgor and bent neck, as well as a lower weight loss by the stems. The application of lemongrass essential oil at 1% caused burns on the petals, compromising quality and pot life. The essential oils of peppermint and eucalyptus allowed flower quality maintenance until the 10th day of evaluation. It is possible to conclude that post-harvest spraying with peppermint or eucalyptus essential oil at 1%, combined with cold storage for 2 days, provided greater longevity and quality for cv. Avalanche roses.

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Gullino, M. L., and A. Garibaldi. "DISEASES OF ROSES: EVOLUTION OF PROBLEMS AND NEW APPROACHES FOR THEIR CONTROL." Acta Horticulturae, no. 424 (July 1996): 195–202. http://dx.doi.org/10.17660/actahortic.1996.424.35.

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18

Mueller, Daren S., Mark L. Gleason, Nicholas P. Howell, and Edward M. Moran. "Evaluation of Griffith Buck Roses for Resistance to Black Spot." HortTechnology 18, no. 4 (January 2008): 588–91. http://dx.doi.org/10.21273/horttech.18.4.588.

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Recently, roses (Rosa spp.) that require relatively little maintenance have gained in popularity in the United States. One group of these roses is the Griffith Buck roses, which were selected to survive the extremely cold winters of the north-central United States. Many of these roses were rated qualitatively as having disease resistance when they were released, but their resistance levels to black spot (Marssonina rosae) have not been quantified, compared with each other, or rated against other resistant or susceptible roses. In a field trial in Iowa in 2005 and 2006, 24 Griffith Buck roses that were originally described as disease resistant were compared with susceptible and resistant control cultivars for susceptibility to black spot. No fungicides were applied in either year. Plants were rated five times each year for black spot incidence, and also to assess overall plant appearance. Griffith Buck roses ‘Carefree Beauty’, ‘Aunt Honey’, ‘Honeysweet’, ‘Earthsong’, and ‘Pearlie Mae’ had significantly less black spot than many of the other cultivars. In addition, these cultivars also remained attractive and could be used in low-maintenance landscapes in the north-central United States, even under moderate black spot pressure.

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Karlik, John F., and Martha P. Gonzalez. "Evaluation of Herbicides for Phytotoxicity to Rose Plants and Efficacy." HortScience 32, no. 3 (June 1997): 429C—429. http://dx.doi.org/10.21273/hortsci.32.3.429c.

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Roses are likely the most popular garden plant in the United States, and cultivars are also used as landscape plant materials. Three herbicide trials with two main objectives were conducted with rose plants. The first objective was to evaluate injury to the roses when over-sprayed at various stages of growth. The second objective was to evaluate the efficacy of the herbicides. All herbicides were used at label rates and applied over the top of rose plants. In the first trial, the pre-emergent herbicides pendimethalin, oryzalin, trifluralin, metolachlor, napropamide, and oxyfluorfen were applied to plots containing dormant roses with ≈1-cm shoots just pushing. Evaluations of shoot length taken over the next 6 weeks showed no differences in growth of rose plants, but weed populations were reduced. In the second trial, five post-emergent herbicides were applied to plots containing dormant roses. Herbicides evaluated included the grass herbicides fluazifop-p-butyl, sethoxydim, and clethodim. The nonselective herbicide glyphosate was included in the trial, as was a combination herbicide containing 2,4-D, mecoprop, and dicamba. There was no visible injury to rose plants until 6 weeks after treatment. At that time, roses treated with glyphosate had shorter shoots. Recovery from glyphosate appeared more rapidly than recovery from the combination herbicide. Weed control varied with each herbicide. The third trial evaluated the same five herbicides for control of bermudagrass in late spring. Injury to roses was noted immediately from the combination herbicide and glyphosate. All the grass herbicides and glyphosate were effective in controlling bermudagrass.

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Clendenen, Beth, B. K. Behe, and K. L. Bowen. "Disease Incidence on Old Garden Roses in the South." HortScience 32, no. 4 (July 1997): 590A—590. http://dx.doi.org/10.21273/hortsci.32.4.590a.

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Eleven rose cultivars were field planted and evaluated weekly for disease, defoliation, and overall vigor in order to compare natural resistance to blackspot (Diplocarpon rosae). Alternative treatments were also compared for efficacy in low-maintenance disease control. Treatments included a bimonthly application of chlorothalonil, a bimonthly application of a horticultural oil, an application of chlorothalonil based on rain events, and a no-treatment control. Cultivars showed significant differences in disease severity, defoliation, and overall performance, with old garden rose varieties showing more natural disease resistance than modern susceptible varieties included in the study. Chlorothalonil applied on a 14-day spray schedule did provide a significant decrease in blackspot disease severity when compared to other treatments. A significant incidence of secondary disease including Cercospora rosicola and Botrytis cinerea occurred on old garden rose varieties. No treatment differences were found for these diseases. `Belinda's Dream', `The Fairy', and `Red Mediland' ranked highest in overall performance throughout the season.

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Hagan, A. K., and J. R. Arkidge. "Entomosporium Leaf Spot Control on Red-tip Photinia in the Landscape." Journal of Environmental Horticulture 29, no. 1 (March 1, 2011): 25–28. http://dx.doi.org/10.24266/0738-2898-29.1.25.

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Abstract In 2006, 2007, and 2008, efficacy of the soil-applied fungicide drench All-In-One Rose & Flower Care [All-In-One] (tebuconazole) was compared with the foliar-applied fungicides Daconil Weather Stik (chlorothalonil), Immunox Multipurpose Fungicide (myclobutanil), RosePride Disease Control Concentrate (triforine), and Disease Control for Roses, Flowers & Shrub Concentrate (tebuconazole) for the control of Entomosporium leaf spot on field-grown red-tip photinia (Photinia × fraseri ‘Birmingham’). While the label rate of All-In-One drench was poured over the soil surface around the base of each plant at monthly intervals, the foliar applied-fungicides were applied at label rates at 2-week intervals to runoff. Over the study period, drenches of All-In-One failed to protect photinia from Entomosporium leaf spot, while the foliar-applied fungicides significantly reduced disease levels. Defoliation on the non-fungicide treated controls was similar to the All-In-One drench and ranged over the study period from 25 to nearly 75%. In contrast, little if any leaf spotting and no defoliation occurred in any of the study years on the photinia treated with Daconil Weather Stik, Immunox Multi-purpose Fungicide, RosePride Disease Control Concentrate, and Disease Control for Roses, Flowers & Shrub Concentrate. Poor efficacy of the All-In-One was attributed to an inadequate concentration of the fungicide component tebuconazole when applied at the label drench rate.

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Holloway, Patricia S. "Aspen Wood Chip and Stone Mulches for Landscape Plantings in Interior, Alaska." Journal of Environmental Horticulture 10, no. 1 (March 1, 1992): 23–27. http://dx.doi.org/10.24266/0738-2898-10.1.23.

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Abstract Five woody landscape plants were grown on five mulch treatments: 2.5 or 5 cm (1 or 2 in) crushed basaltic rock, 5 or 10 cm (2 or 4 in) of aspen wood chips and a non-mulched control, to determine the usefulness of these mulches in subarctic landscape plantings. Weed control was best, but growth and plant nutrition poorest on the wood chip mulches. White spruce, Siberian crabapple, Peking cotoneaster, and rugosa rose had low levels of leaf nitrogen on the wood chip plots, and all species except cotoneaster and lodgepole pine showed significant N deficiency symptoms after 2 years. With the exception of the roses, all species grew best on the stone mulch plots. Roses grew vigorously on the stone mulches and the unmulched soil, but were subject to winter dieback. After 3 years, their total biomass did not exceed the recumbent, spindly and nitrogen deficient roses that were growing on the wood chip mulches. Plant growth, nutrition, and weed control were best achieved on the 5 cm (2 in) stone mulch plots.

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Hammer, Philip E., S. F. Yang, M. S. Reid, and J. J. Marois. "Postharvest Control of Botrytis cinerea Infections on Cut Roses Using Fungistatic Storage Atmospheres." Journal of the American Society for Horticultural Science 115, no. 1 (January 1990): 102–7. http://dx.doi.org/10.21273/jashs.115.1.102.

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The effectiveness of fungistatic atmospheres for postharvest control of Botrytis cinerea Pers. infections on cut rose flowers (Rosa hybrids L.) was investigated. Storing cut `Sonia', `Royalty', and `Gold Rush' roses at 2.5C with 10% CO2 for 5 days, followed by 2 days of cold storage in air, reduced the number of B. cinerea lesions that developed on inoculated and noninoculated flower petals by 77% and 82%, respectively, compared to cold storage for 7 days in air. Higher CO2 concentrations and longer CO2 treatment times reduced disease severity further, but resulted in unacceptable leaf discoloration on some cultivars. No deleterious effects of CO2-enriched storage atmospheres on flower quality, weight gain, or vase life were observed. Storage at 2.5C for 7 days in 2 μl SO2/liter reduced B. cinerea infections on inoculated and noninoculated flowers by 53% and 43%, respectively. No deleterious effects on flower quality, weight gain, or vase life were observed. Higher SO2 levels reduced disease severity further, but caused bleaching of the petal margins and necrosis around leaf wounds.

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Chao, Kuanglin, Richard S. Gates, and Robert G. Anderson. "A Knowledge-based System for Control of the Environment for Single-stem Roses." HortScience 31, no. 4 (August 1996): 654c—654. http://dx.doi.org/10.21273/hortsci.31.4.654c.

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Knowledge engineering offers substantial opportunities for integrating and managing conflicting demands in greenhouse crop production. A fuzzy inference system was developed to balance conflicting requirements of producing a high-quality, single-stem rose crop while simultaneously controlling production costs of heating and ventilation. An adaptive neuro-fuzzy inference system was built to predict the rose status of `Lady Diana' single-stem roses from nondestructive measurements. The fuzzy inference system was capable of making a critical decision based on the principle of economic optimization. Temperature set points for two greenhouses with similar rose status were treated significantly different by the fuzzy inference system due to differences in greenhouse energy consumption. Moderate reduction in heating energy costs could be realized with the fuzzy inference system.

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Dong, Xue, Xiaodong Jiang, Guoqiang Kuang, Qingbo Wang, Micai Zhong, Dongmin Jin, and Jinyong Hu. "Genetic control of flowering time in woody plants: Roses as an emerging model." Plant Diversity 39, no. 2 (April 2017): 104–10. http://dx.doi.org/10.1016/j.pld.2017.01.004.

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Hammer, P. E. "Postharvest Control of Botrytis cinerea on Cut Roses with Picro-cupric-ammonium Formate." Plant Disease 72, no. 4 (1988): 347. http://dx.doi.org/10.1094/pd-72-0347.

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Darlington, A. B., M. A. Dixon, and M. J. Tsujita. "The influence of humidity control on the production of greenhouse roses (Rosa hybrida)." Scientia Horticulturae 49, no. 3-4 (March 1992): 291–303. http://dx.doi.org/10.1016/0304-4238(92)90165-9.

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Paixão Filho, Jorge L. da, Giuliano Gabrielli, Bruno Coraucci Filho, and Adriano L. Tonetti. "Use of stabilization pond sludge in cultivation of roses." Revista Brasileira de Engenharia Agrícola e Ambiental 18, no. 1 (January 2014): 85–89. http://dx.doi.org/10.1590/s1415-43662014000100011.

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One option for the increasing production of sewage sludge (SS) is its agricultural use in crops with high nutritional demand, such as the rose. Therefore, the aim of this work was to study the application of SS from primary stabilization pond in roses of the variety 'Carola'. For the experiment, the roses were planted in 20 L recipients using increasing doses of sludge (T2 - 12 Mg ha-1, T3 - 24 Mg ha-1 and T4 - 36 Mg ha-1), mineral fertilizer (T5) and control treatment (T1, without N) in a randomized block design. The evaluated parameters were: roots dry mass, aerial dry mass, total biomass, leaflets area and nitrogen concentration in the leaf. The SS application resulted in better development of the rose, increasing the roots and the aerial biomasses, the leaflets area, and nitrogen content in the leaves compared to the control (T1). There was no statistical difference between the use of mineral fertilizer (T5), and the SS under the highest dose (T4). With these benefits, the use in agriculture of sewage sludge derived from stabilization ponds proved to be an adequate option for its disposal.

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Serek, Margrethe, Michael S. Reid, and Edward C. Sisler. "A Volatile Ethylene Inhibitor Improves the Postharvest Life of Potted Roses." Journal of the American Society for Horticultural Science 119, no. 3 (May 1994): 572–77. http://dx.doi.org/10.21273/jashs.119.3.572.

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Pretreating `Victory Parade' potted miniature roses (Rosa hybrida L.) with photolyzed diazocyclopentadiene (DACP) inhibited the effects of exogenous ethylene (acceleration of leaf and bud drop). In an ethylene-free simulated interior environment, display life of the treated plants was also greater than that of the controls and similar to that of plants pretreated with the anionic silver thiosulfate complex (STS). DACP caused an increase in the binding constant for ethylene in petals and leaves of `Victory Parade' and `Cara Mia' (a cut-flower rose cultivar). Competitive kinetics for the effects of increasing ethylene concentrations on control and DACP-treated plants are consistent with the hypothesis that the effects of DACP are due to irreversible binding to the ethylene-binding site.

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Chang, Ai-Yu, Mark L. Gleason, Nancy H. Agnew, Dennis G. Olson, and Richard T. Gladon. "Botryis-induced Postharvest Losses of Cut Roses May be Reduced by Electron-bean Irradiation." HortScience 30, no. 4 (July 1995): 835E—835. http://dx.doi.org/10.21273/hortsci.30.4.835e.

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Irradiated cut Rosa × hybrida `Royalty' flowers were used to determine the efficacy of electron-beam irradiation for extending flower postharvest life by reducing native and inoculated populations of Botrytis cinerea. In preliminary experiments, roses received irradiation dosages of 0.00, 0.50,1.00, 2.00, and 4.00 kilogray (kGy), along with an untreated control, to establish killing dosages. Irradiation dosages of 1.00 kGy or greater irreversibly damaged rose petal tissue. In subsequent experiments, roses irradiated at dosages of 0.00, 0.25, 0.50, 0.75, and 1.00 kGy, and an untreated control, were used for evaluating postharvest events. We have found that irradiation dosages of 0.25 and 0.50 kGy slowed the rate of flower bud opening slightly and did not decrease postharvest quality or longevity. Inoculated and uninoculated roses irradiated at 0.00, 0.25, 0.50, and 0.75 kGy were used to determine if electron-beam irradiation could reduce Botrytis infection and proliferation during postharvest storage, and these results also will be presented.

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El-Serafy, Rasha S. "Silica Nanoparticles Enhances Physio-Biochemical Characters and Postharvest Quality of Rosa hybrida L. Cut Flowers." Journal of Horticultural Research 27, no. 1 (June 1, 2019): 47–54. http://dx.doi.org/10.2478/johr-2019-0006.

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Abstract The effect of silica nanoparticles (SiNPs) preservative solutions on the postharvest quality of rose cut flowers was investigated in this study. SiNPs were used at the concentrations of 0, 1, 2, and 3 mg·dm−3. Treatments of SiNPs increased flower longevity compared to untreated flowers. Relative fresh weight, relative water content, and water uptake were improved because of SiNPs treatments. The enhancement in chlorophyll content, total soluble sugars, as well as total phenol and flavonoid contents were positively correlated with SiNPs treatments. Malondialdehyde (MDA) content significantly increased by control roses relative to treated ones. Activities of peroxidase (POX) and polyphenol oxidase (PPO) enzymes significantly increased because of SiNPs treatments compared to the control. The treatment of 2 mg SiNPs·dm−3 maximized the longevity and improved the postharvest quality of cut roses. The results obtained suggested that SiNPs treatments could improve the longevity and postharvest quality of cut roses by reducing lipid peroxidation and motivating antioxidant machinery, therefore, retaining the membrane integrity.

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Chang, Ai-Yu, Richard J. Gladon, Mark L. Gleason, Sharon K. Parker, Nancy H. Agnew, and Dennis G. Olson. "Postharvest Quality of Cut Roses Following Electron-beam Irradiation." HortScience 32, no. 4 (July 1997): 698–701. http://dx.doi.org/10.21273/hortsci.32.4.698.

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Cut Rosa ×hybrida L. `Royalty' flowers were used to determine the efficacy of electron-beam irradiation for increasing postharvest quality and decreasing petal infection by Botrytis cinerea Pers. In an experiment for determining the injury threshold, roses received electron-beam irradiation of 0, 0.5, 1, 2, and 4 kGy. Irradiation dosages ≥1 kGy caused necrosis on petal tissue and decreased postharvest life at 20 °C. In a second experiment to evaluate postharvest quality, roses were irradiated at 0, 0.25, 0.5, 0.75, and 1 kGy. Dosages of 0.25 and 0.5 kGy slowed the rate of flower bud opening for 2 days but did not decrease postharvest quality when compared with nonirradiated roses. Roses that received irradiation dosages of 0.75 and 1 kGy showed unacceptable quality. In a third experiment, roses that had or had not been inoculated with B. cinerea were irradiated at 0, 0.25, 0.5, and 0.75 kGy. Irradiation did not control B. cinerea populations, and rose quality decreased as dosage increased. In a fourth experiment to determine the effect of irradiation on B. cinerea, conidia on water-agar plates exposed to dosages ≤1, 2, and 4 kGy germinated at rates of ≈90%, 33%, and 2%, respectively, within 24 h.

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Hagan, A. K., C. H. Gilliam, and D. C. Fare. "Evaluation of New Fungicides for Control of Rose Blackspot." Journal of Environmental Horticulture 6, no. 2 (June 1, 1988): 67–69. http://dx.doi.org/10.24266/0738-2898-6.2.67.

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Daconil 2787, Spotless, Systhane, Maag RO15-1279, and Funginex were evaluated for blackspot control on field-grown roses. Weekly applications of Systhane at 0.16–0.20 g ai/l (0.021–0.027) oz ai/gal) and Maag RO15-1279 at 0.10 g ai/l (0.013 oz ai/gal) provided season-long blackspot protection equal to Daconil 2787. Lower rates of both Maag RO15-1279 and Systhane were less effective than the recommended rates of both fungicides. Spotless retarded shoot elongation while Systhane and Maag RO15-1279 did not.

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34

Newman, Steven E., Michael J. Roll, and Ronald J. Harkrader. "Controlling Powdery Mildew of Greenhouse Roses Using Quartenary Benzophenanthridine Alkaloids." HortScience 31, no. 4 (August 1996): 675c—675. http://dx.doi.org/10.21273/hortsci.31.4.675c.

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There are many naturally occurring substances that have the potential to be adapted to modern pest control chemistry. Azadirachtin, an insect growth regulator, is one such naturally occurring compound that has been widely accepted in insect pest management. Quartenary benzophenanthridine alkaloids (QBAs) are known to be effective in the control of crop damaging fungal diseases. QBAs can be isolated from plants in the Papaveraceae. Extracts of Macleaya cordata, a species rich in QBAs, were formulated at 150 mg·L–1 QBA for spray application to greenhouse roses infected with Sphaerotheca pannosa var. rosae (powdery mildew). The QBA formulation was applied at 10-day intervals. Copper sulfate pentahydrate (Phyton27), piperalin (Pipron), and fenarimol (Rubigan) were also applied to mildew infected plants within the same greenhouse at their respective label rates for comparison. One day after treatment, the mildew infection was reduced 50% by QBA, whereas fenarimol, copper sulfate pentahydrate, and piperalin reduced the infection 50%, 75%, and 80%, respectively. Nine days after application, the mildew infection of QBA treated plants was less than 5% of the leaflet surface area. QBAs have the potential to be developed as a biorational fungicide for greenhouse use with both fungicidal and fungistatic activity.

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35

Rodríguez, Guillermo. "Why can’t the sun bloom roses in Spanish?" Languages in Contrast 11, no. 2 (September 30, 2011): 241–58. http://dx.doi.org/10.1075/lic.11.2.05rod.

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Levin and Rappaport (1995) have proposed a binary classification for change of state verbs that revolves around the locus of cause for these changes: whether the cause is internal or external to the entity undergoing change. They claim this distinction is crosslinguistically viable and explains the syntactic behavior of these predicates. Based on work done by Smith (1970) and Wright (2001), this paper argues for an extension of Levin and Rappaport’s binary classification. Instead, I propose a continuum resulting from the analysis of corpora in English and Spanish for verbs that would enter the binary categories advanced by Levin and Rappaport. One of the problematic pairs of verbs for their classification when applied to Spanish, florecer ‘to bloom’ and marchitar(se) ‘to wilt’ is analyzed in detail. The continuum proposed here extends Levin and Rappaport’s categories and takes into account the locus of control of the change and whether external factors may be necessary conditions for the change to occur. In particular, this new focus can account for the presence or absence of the clitic se with some of the predicates in Spanish.

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36

Kwon, Song, Gyung Ja Choi, Ki Sun Kim, and Hye Jin Kwon. "Control of Botrytis cinerea and Postharvest Quality of Cut Roses by Electron Beam Irradiation." Korean Journal of Horticultural Science and Technology 32, no. 4 (September 30, 2014): 507–16. http://dx.doi.org/10.7235/hort.2014.14021.

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37

Newman, Steven E., Michael J. Roll, and Ronald J. Harkrader. "A Naturally Occurring Compound for Controlling Powdery Mildew of Greenhouse Roses." HortScience 34, no. 4 (July 1999): 686–89. http://dx.doi.org/10.21273/hortsci.34.4.686.

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Quaternary benzophenanthridine alkaloids (QBAs) isolated from plants in the family Papaveraceae are effective for the control of some fungal diseases. Extracts from Macleaya cordata, a species rich in QBAs, were formulated at 150 mg·L–1 QBA for spray application to greenhouse roses (Rosa sp.) infected with Sphaerotheca pannosa var. rosae (powdery mildew). The QBA formulation was applied at 10-day intervals. For comparison, copper sulfate pentahydrate, piperalin, and fenarimol also were applied to mildewinfected plants within the same greenhouse at their respective labeled rates. One day after treatment, visible symptoms of mildew infection were reduced 60% by QBA, whereas fenarimol, copper sulfate pentahydrate, and piperalin reduced the symptoms of infection 50%, 75%, and 85%, respectively. Subsequent studies demonstrated that a tank mix of QBA and piperalin provided enhanced control of powdery mildew on rose. Results from this study indicate that QBAs have the potential to be developed as a biorational fungicide for greenhouse use with both fungicidal and fungistatic activity.

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Vitullo, Justin M., and Clifford S. Sadof. "Effects of Pesticide Applications and Cultural Controls on Efficacy of Control for Adult Japanese Beetles (Coleoptera: Scarabaeidae) on Roses." Journal of Economic Entomology 100, no. 1 (February 1, 2007): 95–102. http://dx.doi.org/10.1093/jee/100.1.95.

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39

Solís-Pérez, Alma R., and Raul I. Cabrera. "Productivity and Quality Responses of Salt-Stressed Roses to Supplemental Calcium." Journal of Environmental Horticulture 32, no. 3 (September 1, 2014): 155–62. http://dx.doi.org/10.24266/0738-2898.32.3.155.

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Plants of Rosa × spp. L. ‘Happy Hour’ grafted on the rootstocks R. × ‘Manetti’ and R. × ‘Natal Briar’ were salinized with 12 mM NaCl and received supplemental calcium (Ca) applications (as CaSO4) of 0, 2.5, 5.0, 7.5 and 10 mM. Additional plants were salinized with 6 mM Na2SO4 and supplemented with 5 mM CaSO4 and compared to non-salinized, no supplemental Ca control plants. Cumulative flowers harvested, shoot length and leaf chlorophyll index were similar for both rootstocks across salt treatments, but Manetti plants had higher dry weights in flowers and most plant tissues except roots. Productivity and water relations in NaCl-salinized plants were not responsive to supplemental Ca. Conversely, calcium-supplemented plants salinized with Na2SO4 had better productivity and quality than those with NaCl, and were similar to non-stressed control plants. Salt injury symptoms were evident only on NaCl-treated plants, regardless of Ca supplements, and closely associated with chloride, but not sodium, accumulation, in leaf tissues. The extent of the ameliorative properties of supplemental calcium applications on salinized rose plants is influenced by the salinity level, the chemical composition of the salinizing solution (major ions and counter-ions) and the cultivar (scion) and rootstock selection.

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Cabrera, Raul I., Richard Y. Evans, and J. L. Paul. "166 NITROGEN UPTAKE BY ROSES IS ENHANCED BY INTERMITTENT N DEPRIVATION." HortScience 29, no. 5 (May 1994): 452e—452. http://dx.doi.org/10.21273/hortsci.29.5.452e.

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N deprivation is known to increase the rate of N uptake by graminaceous plants, but such response has not been reported for mature woody plants. A recirculating nutrient solution system was utilized to study the effect of intermittent N-deprivation on N uptake by mature `Royalty' rose plants. Plants received a nutrient solution lacking N for 4, 8 or 16 days, after which one containing N was supplied for 4 days. N-deprivation resulted in a 2-3 fold increase in N uptake rate compared to control plants supplied continuously with N (e.g., 143 vs 62 mg N plant-1 day-t). The magnitude of this deprivation-enhanced N uptake was not affected by either the duration of N-deprivation or the plant developmental stage. A characteristic diurnal pattern of N uptake was observed in both N-starved and control plants. Uptake oscillated between minimum rates in the morning and maximum rates in the evening, the latter occurring 4-6 hr after the maximum transpiration rates. The ability to increase the rate of N uptake in roses by depriving them of N for several days may be of practical importance for increasing N fertilizer use efficiency and decreasing N losses to leaching.

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41

Horibe, Takanori, and Maho Makita. "Methyl Jasmonate Treatment Delays Flower Opening and Petal Wilting of Three Cut Rose Cultivars." Journal of Horticultural Research 27, no. 2 (December 1, 2019): 1–10. http://dx.doi.org/10.2478/johr-2019-0016.

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AbstractDeveloping a method for the control of cut flower opening and improvement of cut flower quality is important to meet consumer demand. In this study, we investigated the effects of methyl jasmonate (MeJA) on flower opening of three rose cultivars: ‘Red Star,’ ‘Princes Meg,’ and ‘Madrid’. Shoot bases of cut roses were immersed in water solutions containing 100- or 1000-μM MeJA in addition to 2% weight/volume (w/v) sucrose and 0.02% w/v 8-hydroxyquinoline monohydrate. Subsequently, the vase life, flower opening, petal wilting, petal weight, water uptake, and water evaporation were measured. Flower opening of all three cultivars was clearly delayed following the treatment with MeJA, resulting in prolonged vase life compared with control. In addition, flower wilting was suppressed in all cultivars. Moreover, 7 days following treatment, the petal fresh weight was maintained high in the ‘Red Star’ and ‘Princes Meg’ cultivars. However, there was no significant difference in the ‘Madrid’ cultivar versus control. In all three cultivars, there was a minimal difference in the total amount of water uptake and evaporation. Thus, it is suggested that the total amount of water uptake and evaporation have limited relevance to the changes in the relative fresh weight of cut roses and petal fresh weight observed following treatments. Despite the difference in the sensitivity of the rose cultivars to treatment with MeJA, we conclude that MeJA has high potential as a quality retention agent for cut roses.

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Kozlova, Ekaterina, Vladimir Moor, and Lidiya Krasavina. "Application of phytoseiid mites for whitefly control on roses in the North-West of Russia." BIO Web of Conferences 18 (2020): 00016. http://dx.doi.org/10.1051/bioconf/20201800016.

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Predatory mites Amblyseius swirskii and Neoseiulus cucumeris are considered as effective biocontrol agents against whitefly and thrips in indoors on vegetable crops. Our goal was to assess the effect of these predatory mites on whitefly density on roses indoors in the North-West of Russia. Result showed that the dynamics of the pest population is affected not only by the predator release rate, but also by the time between introductions and their frequency. There was no difference between two species, except one case, when temperatures had risen above 27°C and consequently A. swirskii had a bigger impact on whiteflies than N. cucumeris.

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Ittah, Yitzhak, and Uzi Zisman. "Evaluation of volatile allyl alcohol derivatives for control of snails on cut roses for export." Pesticide Science 35, no. 2 (1992): 183–86. http://dx.doi.org/10.1002/ps.2780350214.

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Goodwin, Stephen, Grant Herron, Neil Gough, Tony Wellham, Jeanette Rophail, and Russell Parker. "Relationship Between Insecticide-Acaricide Resistance and Field Control in Tetranychus urticae (Acari: Tetranychidae) Infesting Roses." Journal of Economic Entomology 88, no. 5 (October 1, 1995): 1106–12. http://dx.doi.org/10.1093/jee/88.5.1106.

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45

Torre, Sissel, Tove Fjeld, Hans Ragnar Gislerød, and Roar Moe. "Leaf Anatomy and Stomatal Morphology of Greenhouse Roses Grown at Moderate or High Air Humidity." Journal of the American Society for Horticultural Science 128, no. 4 (July 2003): 598–602. http://dx.doi.org/10.21273/jashs.128.4.0598.

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Single node cuttings with one mature leaf were taken from Rosa ×hybrida `Baroness' and rooted in water culture. The plants were subjected to either 90% (high) or 70% (moderate) relative humidity (RH) in climate chambers. Single stem roses with intact roots were transferred to 40% (low) RH to investigate the stomatal response to water stress. Moderate RH plants showed decreasing leaf conductance from day 1 to day 3 during both light and dark phases, in contrast to high RH roses, which showed almost similar leaf conductances during the 3 days. Leaf samples were studied with a light microscope (LM) and a scanning electron microscope (SEM) to quantify morphological and structural changes. Epidermal imprints showed a significantly higher number of stomata and longer stomata, as well as a wider stomatal apertures on roses grown at high RH. The high RH leaves showed a reduced density of vascular tissue and thinner leaves when compared to moderate RH leaves. Enlarged intercellular air-space (ICA) was found due to a reduced number of spongy and palisade mesophyll cells. No obvious difference in shape, size, undulation or the structure of the epicuticular wax was observed in SEM between high and moderate RH grown leaves. In conclusion, roses subjected to high RH showed differences in leaf anatomy, stomatal morphology and stomatal function, which may explain the loss of water control of these plants. Stomatal ontogenesis should occur at RH conditions below 85% to secure roses with a high postharvest quality potential.

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46

Newman, Steven E., Michael J. Roll, and Ronald J. Harkrader. "550 A Naturally Occurring Compound for Controlling Powdery Mildew of Greenhouse Roses." HortScience 34, no. 3 (June 1999): 541A—541. http://dx.doi.org/10.21273/hortsci.34.3.541a.

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Quaternary benzophenanthridine alkaloids (QBAs) isolated from plants in the family Papaveraceae are effective for the control of some fungal diseases. Extracts from Macleaya cordata, a species rich in QBAs, were formulated at 150 mg·L–1 QBA for spray application to greenhouse roses infected with Sphaerotheca pannosa var. rosae (powdery mildew). The QBA formulation was applied at 10-day intervals. For comparison, copper sulfate pentahydrate, piperalin, and fenarimol also were applied to mildew-infected plants within the same greenhouse at their respective labeled rates. One day after treatment, visible symptoms of mildew infection were reduced 60% by QBA, whereas fenarimol, copper sulfate pentahydrate, and piperalin reduced the symptoms of infection 50%, 75%, and 85%, respectively. Subsequent studies demonstrated that a tank mix of QBA and piperalin provided enhanced control of powdery mildew on rose. Results from this study indicate that QBAs have the potential to be developed as a biorational fungicide for greenhouse use with both fungicidal and fungistatic activity.

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47

Mladenovic, Emina, Jelena Cukanovic, Biljana Bozanic-Tanjga, Lazar Pavlovic, Ksenija Hiel, and Mirjana Miric. "Selection of garden rose cultivars for use as a cut flower." Genetika 50, no. 2 (2018): 495–502. http://dx.doi.org/10.2298/gensr180249m.

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Efficacy of preservative solutions on vase life of garden roses has not been researched before. Vast variability and morphological characteristics of this group of roses are very important, making them suitable for their use in bouquets, arrangements and vases. This research was carried out to examine the influence of five preservative solutions on vase life of garden rose cut flowers. The aim of research was to determine best preservative solution for prolonging of vase life of garden rose cut flower. The experiment included 8 rose cultivars cultivated for garden use. Each treatment consisted of 10 cut garden roses. The cut garden rose flowers with vase solution containing Al2(SO4)3+ethanol+sucrose register longer vase life and higher values in water uptake. Vase life of flowers held in tap water (control) was lowest (4.38 days). This research backs the assumption that with the use of preservative solutions, garden rose also can be used as a cut flower.

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Horibe, Takanori, and Kunio Yamada. "Petal Growth Physiology of Cut Rose Flowers: Progress and Future Prospects." Journal of Horticultural Research 25, no. 1 (June 30, 2017): 5–18. http://dx.doi.org/10.1515/johr-2017-0001.

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AbstractRoses are the most important crop in the floriculture industry and attract both pollinators and human admirers. Until now, a lot of research focusing on postharvest physiology including flower senescence has been conducted, leading to improvement in vase life. However, few studies have focused on the physiology of petal growth, the perception of light by petals, and the relationship between petal growth and environmental conditions. Regarding roses, whose ornamental value lies in the process of blooming from buds, it is also important to understand their flowering mechanisms and establish methods to control such mechanisms, as well as focus on slowing the aging process, in order to achieve high quality of postharvest cut roses. Elucidation of the mechanisms of rose flower opening would contribute to enhanced quality and commercial production of floricultural crops as well as greatly advance basic scientific knowledge regarding plant biology. In this review, we describe the progress and future prospects in the study of petal growth physiology of cut roses.

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BALAZSOVITS, J., B. DANSEREAU, S. GAGNON, and R. C. BEESON JR. "EFFETS À LONG TERME DE L’ENRICHISSEMENT CARBONÉ ET D’UN APPOINT DE LUMIÈRE SUR LA PRODUCTIVITÉ DE LA ROSE CULTIVÉE EN SERRE." Canadian Journal of Plant Science 69, no. 3 (July 1, 1989): 979–89. http://dx.doi.org/10.4141/cjps89-119.

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Roses (Rosa hybrida ’Royalty’) were grown at atmospheric CO2 concentrations of 330, 900 or 1500 ppm with or without supplemental lighting of 50 μmol m−2s−1 (PAR) provided by high pressure sodium lamps (HPS). Supplementary lighting and CO2 enrichment increased total yields of marketable flowers by 34 and 26%, respectively, compared with the control plants (natural lighting and CO2 concentration conditions). The combined effects of these treatments increased yield by 69% compared with the control. Improved flower quality and shortened production cycles were also observed. Flower stem length and diameter were not significantly affected by the treatments. The increased production levels obtained with CO2 enrichment and supplementary lighting were maintained throughout the treatment and post-treatment periods. These results indicate that rose plants respond positively to long-term CO2 enrichment and show beneficial residual effects to the treatments.Key words: Carbon dioxide, supplemental lighting, roses, growth, productivity

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Muñoz, M., J. E. Faust, and G. Schnabel. "Characterization of Botrytis cinerea From Commercial Cut Flower Roses." Plant Disease 103, no. 7 (July 2019): 1577–83. http://dx.doi.org/10.1094/pdis-09-18-1623-re.

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Botrytis cinerea Pers. infects cut flower roses (Rosa × hybrida L.) during greenhouse production and gray mold symptoms are often expressed in the postharvest environment, resulting in significant economic losses. Disease management is based on cultural practices and preventative chemical treatments; however, gray mold outbreaks continue to occur. Rose tissues from six commercial shipments from two greenhouses in Colombia were evaluated to determine the Botrytis species composition as well as identify other pathogens present, gray mold incidence and severity, and fungicide resistance profiles. Botrytis isolates (49 total) were grouped into six morphological phenotypes, and all were identified to be B. cinerea sensu stricto. Disease incidence was higher in the petals than in the stem, stamen, ovary, sepal, or leaf tissues. Other fungi were isolated infrequently and included Alternaria alternata, Cladosporium cladosporioides, Epicoccum nigrum, Penicillium citrinum, Aspergillus brasiliensis, and Diplodia sp. Fungicide resistance profiles were determined using previously established discriminatory doses. Isolates resistant to thiophanate-methyl, iprodione, boscalid, and cyprodinil were found frequently in all shipments and in both greenhouses. The frequency of resistance to penthiopyrad, fenhexamid, fluopyram, isofetamid, and fludioxonil varied between shipments and greenhouses. No resistance to pydiflumetofen was observed at the discriminatory doses tested. Isolates with resistance to multiple chemical classes were commonly found. These results indicate that fungicide resistance management practices may improve preharvest and postharvest gray mold control of cut flower roses.

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Journal articles on the topic 'Roses – Control'

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