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Journal articles on the topic 'Couch-grass'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Brej, Teresa. "Population biology of Agropyron repens (L.) P. Beauv. around the copper smelter Legnica." Acta Societatis Botanicorum Poloniae 69, no. 4 (2014): 299–309. http://dx.doi.org/10.5586/asbp.2000.040.

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The present paper constitutes a background for the properties of couch grass tolerance for heavy metals previously recorded by the author. The tolerance for lead, zinc, copper and cadmium were described in couch grass on sites in the vicinity of the copper smelter Legnica. Most of the now presented results come from four-year field investigations, concerning four couch grass populations growing at different distances from the emitter. The over 50 year activity of the smelter affected specifically the traits and properties of the couch grass populations and their dynamics. This is expressed in

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2

Ayres, J. R., J. Awad, H. Burger, J. Marzouk, and J. van Leeuwen. "Investigation of the potential of buffalo and couch grasses to grow on AFIs and for removal of nutrients from paper mill wastewater." Water Science and Technology 79, no. 4 (2019): 779–88. http://dx.doi.org/10.2166/wst.2019.098.

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Abstract The potential growth of buffalo grass (Stenotaphrum secundatum) and couch grass (Cynodon dactylon) on artificial floating islands (AFIs) and their ability to remove total nitrogen (TN) and total phosphorus (TP) from a simulated paper mill wastewater was studied. This was done to assess the potential of AFIs for removal of nutrients from aerated stabilization basins (ASBs) that had occasional growth of blue-green algae (BGA) to bloom levels. Small scale AFIs were prepared using polyethylene foam and planted with the grasses in 30 L of tested water. Trials were conducted in a plastic co

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3

Brej, Teresa. "Ecological significance of assimilate distribution in Agropyron repens clones under influence of the copper smelter Legnica." Acta Societatis Botanicorum Poloniae 70, no. 2 (2014): 145–51. http://dx.doi.org/10.5586/asbp.2001.019.

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The studies on couch grass (<em>Agropyron repens</em> (L.) P. Beauv.) populations growing in stress conditions in close vicinity of a copper smelter concern the integrity of clonal structure. The connections of tillers within a clone and the interclonal integrity was investigated by means of assimilate translocation, using <sup>14</sup>C. It was found that heavy metal stress affects the phenotypic plasticity of couch grass in regard to clonal growth of the phalanx type. The phalanx type growth is supported by a considerable integration, which allows the redistribution o

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4

Van Toor, R. F., S. F. Chng, R. M. Warren, and R. C. Butler. "Influence of glyphosate herbicide treatment of couch grass on take-all caused by Gaeumannomyces graminis var. tritici with the addition of soil-borne microorganisms." New Zealand Plant Protection 70 (July 24, 2017): 186–95. http://dx.doi.org/10.30843/nzpp.2017.70.48.

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Couch grass rhizomes harbour Gaeumannomyces graminis var. tritici (Ggt), which causes take-all of wheat. Glyphosate used after cereal harvest to control couch can increase take- all in subsequent wheat crops. Following glyphosate treatment, the colonisation of senescing couch rhizomes by Ggt when treated with the endophytic fungus Microdochium bolleyi, and the spread of Ggt from senescing couch rhizomes to wheat when treated with the rhizobacterium Pseudomonas fluorescens, were investigated in two separate experiments. In Experiment 1, glyphosate increased Ggt inoculum in couch, irrespective o

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5

SOON, Y. K., and A. L. DARWENT. "Effect of integrated management of couch grass (Elytrigia repens) on soil quality and crop nutrition." Journal of Agricultural Science 130, no. 3 (1998): 323–28. http://dx.doi.org/10.1017/s0021859697005157.

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The effects of suppressing couch grass (Elytrigia repens L.), through integrated management, on soil biological quality and N and P nutrition of barley (Hordeum vulgare L.) were evaluated in a field experiment (1987–92) on a Dark Grey soil in Alberta, Canada. The management practices consisted of combinations of herbicide application, crop rotations and tillage treatments. The 3-year crop sequences consisted of continuous barley, canola (Brassica rapa L.)–barley–barley, fallow–barley–barley, and barley or canola undersown with red clover (Trifolium pratense L.)–red clover green manure–barley.

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6

Brej, Teresa. "Heavy metal tolerance in Agropyron repens (L.) P. Bauv. populations from the Legnica copper smelter area, Lower Silesia." Acta Societatis Botanicorum Poloniae 67, no. 3-4 (2014): 325–33. http://dx.doi.org/10.5586/asbp.1998.041.

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The copper smelter "Legnica" is one of the oldest plants in Lower Silesia. Among the few weed species spontaneously migrating to the area around the emitter there is couch grass (<em>Agropyron repens</em> (L.) P. Bauv.). The purpose of this study was to analyse whether the local couch grass populations, growing at various distances from the smelter, differ in tolerance to heavy metals occurring in this area. The populations were tested for tolerance to five metals (Cu, Zn, Pb, Cd, Ni) using the root elongation method. The highest tolerance to Pb developed in two populations localiz

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7

Štýbnarová, Marie, Pavlína Mičová, Hana Karabcová, and Marie Svozilová. "Occurrence of couch grass [Elytrigia repens (L.) Desv. ex Nevski] under different grassland management." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 5 (2013): 1399–404. http://dx.doi.org/10.11118/actaun201361051399.

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The objective of this research was to investigate occurrence of common couch grass (Elytrigia repens(L.) Desv. ex Nevski) under different grassland management by means of a small-plot trial. The trial was managed during 2003–2011 with four levels of utilisation: intensive (4 cuts per year, 1stcut on 15 May), medium intensive (3 cuts per year, 1stcut on 30 May), low intensive (2 cuts per year, 1stcut on 15 June), and extensive (2 cuts per year, 1stcut on 30 June). Four rates of fertilisation were applied for each utilisation treatment: nil-fertilisation, P30K60, N90P30K60, and N180P30K60(pure n

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8

Barrett-Lennard, E. G., Sarita Jane Bennett, and M. Altman. "Survival and growth of perennial halophytes on saltland in a Mediterranean environment is affected by depth to watertable in summer as well as subsoil salinity." Crop and Pasture Science 64, no. 2 (2013): 123. http://dx.doi.org/10.1071/cp12416.

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Farmers need methods for assessing the capability of saltland for productive use based on characteristics that are readily measurable at the paddock scale. We conducted experiments on saltland transects with gradients of salinity and depth to watertable at three sites in south-western Australia. Each was planted with five perennial species with at least some salt tolerance: samphire (Tecticornia mellaria K.A.Sheph.), river saltbush (Atriplex amnicola Paul G.Wilson), small leaf bluebush (Maireana brevifolia (R.Br.) Paul G.Wilson), saltwater couch (Paspalum vaginatum Sw.), and Rhodes grass (Chlo

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9

Chunkao, K., O. Phewnil, T. Pattamapitoon, N. Semvimol, and W. Wararam. "Grass filtration in parallel with VFCW technology for community wastewater treatment through the king's initiative nature-by-nature process." Water Practice and Technology 10, no. 4 (2015): 633–43. http://dx.doi.org/10.2166/wpt.2015.071.

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The 15-year research is aimed to apply the Vertical Flow Constructed Wetland (VFCW) technology along with growing Star, Kallar, Coast couch grasses for community wastewater treatment as obtained from Phetchaburi municipal after anaerobic digesting inside the 18.5 km High-density Polyethylene (HDPE) pipe. The results found that pH value did not evidently show any change of influent to effluent among grass species but drastic change due to treatment efficiency in Biological Oxygen Demand (BOD), Total Kjeldahl Nitrogen (TKD), Total Phosphorus (TP), and Total Potassium (TK) due to supporting rapid

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10

Semple, W. S., I. A. Cole, and T. B. Koen. "Native couch grasses for revegetating severely salinised sites on the inland slopes of NSW." Rangeland Journal 26, no. 1 (2004): 88. http://dx.doi.org/10.1071/rj04006.

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Two scalded saline sites on the inland slopes of NSW were selected for an evaluation of ten accessions of warm-season stoloniferous/rhizomatous grass species: common couch (Cynodon dactylon), marine couch (Sporobolus virginicus), rats-tail couch (S. mitchellii), salt-water couch (Paspalum vaginatum), water couch (P. distichum) and one exotic, kikuyu (Pennisetum clandestinum). Most species performed well at Wagga Wagga but only common couch, marine couch and salt-water couch did at Manildra, where they consistently outperformed the other native species in terms of survival, groundcover and vigo

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11

Jones, R. J. "Steer gains, pasture yield and pasture composition on native pasture and on native pasture oversown with Indian couch (Bothriochloa pertusa) at three stocking rates." Australian Journal of Experimental Agriculture 37, no. 7 (1997): 755. http://dx.doi.org/10.1071/ea97032.

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Summary. Pasture production and steer liveweight gain were compared on native pasture (Bothriochloa decipiens, Heteropogon contortus, Themeda triandra and Chrysopogon fallax) and on native pasture oversown with Indian couch or Indian bluegrass (Bothriochloa pertusa). This grass was not a planned introduction to the area but is spreading in Central and North Queensland and its value as a pasture species is questioned by graziers. There were 3 nominal stocking rates of 0.3, 0.6 and 0.9 steers/ha. Each paddock was stocked with 3 steers of stratified ages. The experiment was sown in March 1988 and

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12

Frankow-Lindberg, B. E. "Effect of Couch Grass and Grass Cultivars on Competition Between Timothy and Red Clover." Journal of Applied Ecology 22, no. 2 (1985): 519. http://dx.doi.org/10.2307/2403182.

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13

Zhou, Yi, Christopher J. Lambrides, Jishun Li, et al. "Nitrifying Microbes in the Rhizosphere of Perennial Grasses Are Modified by Biological Nitrification Inhibition." Microorganisms 8, no. 11 (2020): 1687. http://dx.doi.org/10.3390/microorganisms8111687.

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Soil nitrification (microbial oxidation of ammonium to nitrate) can lead to nitrogen leaching and environmental pollution. A number of plant species are able to suppress soil nitrifiers by exuding inhibitors from roots, a process called biological nitrification inhibition (BNI). However, the BNI activity of perennial grasses in the nutrient-poor soils of Australia and the effects of BNI activity on nitrifying microbes in the rhizosphere microbiome have not been well studied. Here we evaluated the BNI capacity of bermudagrass (Cynodon dactylon L.), St. Augustinegrass (Stenotaphrum secundatum (W

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14

Ringselle, Björn, Benny De Cauwer, Jukka Salonen, and Josef Soukup. "A Review of Non-Chemical Management of Couch Grass (Elymus repens)." Agronomy 10, no. 8 (2020): 1178. http://dx.doi.org/10.3390/agronomy10081178.

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Couch grass (Elymus repens) is a morphologically diverse, rhizomatous, perennial grass that is a problematic weed in a wide range of crops. It is generally controlled by glyphosate or intensive tillage in the intercrop period, or selective herbicides in non-susceptible crops. The aim of this review is to determine the efficacy of non-chemical strategies for E. repens control. The review shows that indirect control measures like crop choice, subsidiary crops, and fertilizer regimes influence E. repens abundance, but usually cannot control E. repens. Defoliation (e.g., mowing) can control E. rep

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15

Boonyaroj, Varinthorn, and Samanya Sanguanpak. "Effect of Sodium Hydroxide Concentrations on Properties of Panicum repens for Pulp and Paper." Applied Mechanics and Materials 866 (June 2017): 216–19. http://dx.doi.org/10.4028/www.scientific.net/amm.866.216.

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Panicum repens is a species of grass known by many common names, including torpedo grass, creeping panic, panic rampant, couch panicum, wainaku grass, quack grass, dog-tooth grass, and bullet grass. The paper has been made from non-wood materials for long times. This research was used Panicum repens for made grass pulp as non-wood fiber. The influence of sodium hydroxide (NaOH) concentrations on properties of pulp from Panicum repens was investigated under room temperature. NaOH concentration levels were varied at 0%, 5%, 10%, 15%, and 20%, respectively. Moreover, Paper pulp from Panicum repen

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16

Emeka, Okoli Jude, Haslinda Nahazanan, Bahareh Kalantar, Zailani Khuzaimah, and Ojogbane Success Sani. "Evaluation of the Effect of Hydroseeded Vegetation for Slope Reinforcement." Land 10, no. 10 (2021): 995. http://dx.doi.org/10.3390/land10100995.

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A landslide is a significant environmental hazard that results in an enormous loss of lives and properties. Studies have revealed that rainfall, soil characteristics, and human errors, such as deforestation, are the leading causes of landslides, reducing soil water infiltration and increasing the water runoff of a slope. This paper introduces vegetation establishment as a low-cost, practical measure for slope reinforcement through the ground cover and the root of the vegetation. This study reveals the level of complexity of the terrain with regards to the evaluation of high and low stability a

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17

Sierota, Z., M. Damszel, M. Borys, and J. A. Nowakowska. "The couch grass rhizome withHeterobasidion annosumfruiting bodies in afforested post-agricultural land." Forest Pathology 46, no. 4 (2016): 376–79. http://dx.doi.org/10.1111/efp.12289.

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18

Hedmark, Å., and M. Jonsson. "Treatment of log yard runoff in a couch grass infiltration wetland in Sweden." International Journal of Environmental Studies 65, no. 2 (2008): 267–72. http://dx.doi.org/10.1080/00207230701406906.

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19

CAMMUE, Bruno, Hetty M. STINISSEN, and Willy J. PEUMANS. "A new type of cereal lectin from leaves of couch grass (Agropyrum repens)." European Journal of Biochemistry 148, no. 2 (1985): 315–22. http://dx.doi.org/10.1111/j.1432-1033.1985.tb08841.x.

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20

Woodhall, J. W., and A. K. Lees. "First report of Rhizoctonia solani anastomosis group 5 (AG5) on couch grass in Britain." Plant Pathology 53, no. 4 (2004): 538. http://dx.doi.org/10.1111/j.1365-3059.2004.01041.x.

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21

Marshall, E. J. P. "Interference between sown grasses and the growth of rhizome of Elymus repens (couch grass)." Agriculture, Ecosystems & Environment 33, no. 1 (1990): 11–22. http://dx.doi.org/10.1016/0167-8809(90)90140-9.

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22

Tsukiboshi, T., I. Okabe, and K. Sugawara. "First Report of Blast of Guinea Grass Caused by Pyricularia sp. LS-Group in Japan." Plant Disease 93, no. 12 (2009): 1350. http://dx.doi.org/10.1094/pdis-93-12-1350c.

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Guinea grass (Panicum maximum Jacq.) is an important C-4 perennial herbage in the southern part of Japan. In February 2002, a blast disease was found on the grass cultivated on the Okinawa Islands, the southern most region of Japan. Early symptoms appeared as small, round or ellipsoid lesions on leaves. Lesions later expanded to 2 to 5 × 1 to 2 mm and were spindle shaped and grayish white in the central area with dark brown margins. We obtained three single-conidia isolates of a Pyricularia-like fungus from the lesions and deposited them in the NIAS Genebank, Japan as MAFF306662, 306671, and 3

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23

Petrova, A. P., E. A. Krasnov, E. V. Saprykina, Yu A. Subbotina, and E. V. Ermilova. "Chemical composition of couch grass and studies of its antioxidant activity in allergic contact dermatitis." Pharmaceutical Chemistry Journal 43, no. 1 (2009): 48–50. http://dx.doi.org/10.1007/s11094-009-0231-1.

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24

Tadjieva, G. Z., O. S. Mirzaev, and Kh N. Shadieva. "Skin Test Results in Patients with Allergies in Samarkand Region." Doctor.Ru 19, no. 11 (2020): 56–60. http://dx.doi.org/10.31550/1727-2378-2020-19-11-56-60.

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Study Objective: To assess skin test results in patients with some allergies. Design: Perspective comparative study. Materials and Methods. We examined 1,963 patients with allergies who presented to Tadjieva Allergo-Medical Service LLC (Samarkand) in 2018–2019. 895 patients consented to and underwent allergy testing with scarification skin tests; they had various allergies (bronchial asthma, allergic rhinoconjunctivitis, allergic bronchitis, atopic dermatitis, urticaria). We used 76 types of most common allergens, including 24 plant allergens, 7 domestic allergens, 13 fungal allergens, 3 epide

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25

Robinson, Jonathan. "First report of Diuraphis (Holcaphis) frequens as a pest of wheat in Finland." Agricultural and Food Science 6, no. 4 (1997): 337–39. http://dx.doi.org/10.23986/afsci.72796.

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Colonies of Diuraphis (Holcaphis) frequens (Walker) were found on wheat, Triticum aestivum L. in the vicinity of Jokioinen in south-west Finland in summer 1997. The aphid was present in all wheat fields inspected, and was particularly abundant on spring wheat plants of field and plot margins. The aphid was also common on its recognised, host Elymus repens (L.) Gould (couch grass). Damage symptoms, longitudinal chlorotic streaking of tightly rolled leaves, resembled those caused by Diuraphis noxia (Mordvilko), the Russian wheat aphid. Diuraphis frequens appears unlikely to become a serious pest

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26

Tran, Thi Kim Anh, Rafiquel Islam, Diep Le Van, Mohammad Mahmudur Rahman, Richard Man Kit Yu, and Geoff R. MacFarlane. "Accumulation and partitioning of metals and metalloids in the halophytic saltmarsh grass, saltwater couch, Sporobolus virginicus." Science of The Total Environment 713 (April 2020): 136576. http://dx.doi.org/10.1016/j.scitotenv.2020.136576.

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27

Sileshi, Gudeta. "Potential biocontrol agents for the blue couch grass, Digitaria abyssinica (A. Rich.) Stapf., in East Africa." International Journal of Pest Management 43, no. 2 (1997): 173–76. http://dx.doi.org/10.1080/096708797228906.

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28

Bergeron, Jean-Marie, and Louise Jodoin. "Plant Composition in Relation to Vole Damage in Coniferous Plantations." Forestry Chronicle 65, no. 3 (1989): 206–10. http://dx.doi.org/10.5558/tfc65206-3.

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We analysed the plant composition of several coniferous plantations of Eastern Townships of Quebec to examine the relationships between biomass patterns and levels of damage made by meadow voles (Microtus pennsylvanicus) to young trees. The biomass of the most abundant grass species was compared in severely damaged, lightly damaged and undamaged plantations. Damage indices per plantation were standardized using the composite Mizushima (1976) index. Total biomass did not differ between the three categories of plantations analysed. However, heavily damaged plantations contained significantly mor

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29

Niks, Rients E., Skye van Heyzen, Les J. Szabo, and Sisay K. Alemu. "Host status of barley to Puccinia coronata from couch grass and P. striiformis from wheat and brome." European Journal of Plant Pathology 136, no. 2 (2013): 393–405. http://dx.doi.org/10.1007/s10658-013-0174-y.

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30

Lembicz, M., K. Górzyńska, and A. Leuchtmann. "Choke Disease Caused by Epichloë bromicola in the Grass Agropyron repens in Poland." Plant Disease 94, no. 11 (2010): 1372. http://dx.doi.org/10.1094/pdis-12-09-0810.

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Agropyron repens (synonym Elymus repens, couch grass) is a species native to Europe and Asia. In Poland, it is a common weed of crop fields. In May 2008, we noticed for the first time symptoms of choke disease (caused by Epichloë spp.) on A. repens at two localities in central Poland. The localities, Pakość (52°47.531′N, 18°06.118′E) and Dulsk (52°45.329′N, 18°20.518′E), are located 16 km apart from each other. The following year, we confirmed the occurrence of choke disease on couch grass at these localities. Stromata were formed on reproductive stems that did not produce inflorescences. They

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31

Noskova, E. V. "Влияние систем земледелия на показатели обилия сорных растений и урожайность кукурузы". Vestnik APK Verhnevolzh`ia, № 2(46) (30 червня 2019): 7–10. http://dx.doi.org/10.35694/yarcx.2019.46.2.002.

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Исследования проводились на дерновоподзолистой среднесуглинистой почве нормального увлажнения. В опыте изучалось влияние органических и минеральных удобрений в разной дозе на видовой состав сорных растений в посевах и урожайность зелёной массы кукурузы. Применение в посевах кукурузы органоминеральных удобрений с полной и сниженной дозой привело к уменьшению доли участия многолетних видов на 11,1 и 11,5 соответственно, в сравнении с контролем. На данных фонах наблюдалось снижение доли участия пырея ползучего на 5,26,7, осота полевого на 2,83,5, бодяка полевого на 1,53,5, повышение доли участия

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James, T. K., and A. Rahman. "Control of couch (Elytrigia repens) and mercer grass (Paspalum distichum) in maize with nicosulfuron." Proceedings of the New Zealand Plant Protection Conference 50 (August 1, 1997): 467–71. http://dx.doi.org/10.30843/nzpp.1997.50.11305.

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33

Semple, W. S., I. A. Cole, T. B. Koen, D. Costello, and D. Stringer. "Native couch grasses for revegetating severely salinised sites on the inland slopes of NSW. Part 2." Rangeland Journal 28, no. 2 (2006): 163. http://dx.doi.org/10.1071/rj06004.

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Perennial ‘couch’ grasses that reproduce from rhizomes and or stolons have some advantages on scalded saline sites where they can reproduce in situations that are often hostile to germination and establishment of obligate seeders. Promising couch grass species from an earlier evaluation at Wagga Wagga and Manildra were Cynodon dactylon, Paspalum vaginatum, Sporobolus virginicus and, to a lesser extent, Sporobolus mitchellii. This paper reports results of a subsequent evaluation of these species as well as Eragrostis dielsii and Distichlis distichophylla at 3 other saline sites (Burrumbuttock,

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Dhanalakshmi, Kandaswamy, Periyakali Bhavan, Gopalan Rajkumar, Virumandi Nathiya, Veeran Srinivasan, and Thangavelu Satgurunathan. "Phytochemical Characterization of Couch Grass (Cynodon dactylon) and Its Growth Promoting Potential on the Freshwater Prawn Macrobrachium rosenbergii Post-Larvae." British Biotechnology Journal 14, no. 2 (2016): 1–24. http://dx.doi.org/10.9734/bbj/2016/26863.

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35

Elouaqoudi, Fatima Zahra, Loubna El Fels, Soumia Amir, et al. "Lipid signature of the microbial community structure during composting of date palm waste alone or mixed with couch grass clippings." International Biodeterioration & Biodegradation 97 (January 2015): 75–84. http://dx.doi.org/10.1016/j.ibiod.2014.08.016.

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36

Niks, Rients E., Sisay K. Alemu, Thierry C. Marcel, and Skye van Heyzen. "Mapping genes in barley for resistance to Puccinia coronata from couch grass and to P. striiformis from brome, wheat and barley." Euphytica 206, no. 2 (2015): 487–99. http://dx.doi.org/10.1007/s10681-015-1516-y.

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37

Martin, P. K., M. Taeb, and R. M. D. Koebner. "The Effect of Photoperiod Insensitivity on the Salt Tolerance of Amphiploids between Bread Wheat (Triticum aestivum) and Sand Couch Grass (Thinopyrum bessarabicum)." Plant Breeding 111, no. 4 (1993): 283–89. http://dx.doi.org/10.1111/j.1439-0523.1993.tb00643.x.

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38

Pathan, S. M., L. Barton, and T. D. Colmer. "Evaluation of a soil moisture sensor to reduce water and nutrient leaching in turfgrass (Cynodon dactylon cv. Wintergreen)." Australian Journal of Experimental Agriculture 47, no. 2 (2007): 215. http://dx.doi.org/10.1071/ea05189.

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This study evaluated water application rates, leaching and quality of couch grass (Cynodon dactylon cv. Wintergreen) under a soil moisture sensor-controlled irrigation system, compared with plots under conventional irrigation scheduling as recommended for domestic lawns in Perth, Western Australia by the State’s water supplier. The cumulative volume of water applied during summer to the field plots of turfgrass with the sensor-controlled system was 25% less than that applied to plots with conventional irrigation scheduling. During 154 days over summer and autumn, about 4% of the applied water

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39

Kryukova, Kristina Dmitrievna, and Valeriya Olegovna Gresis. "Differences in biological efficiency of one- and two-component graminicide on sugar beet crops in Tula region." RUDN Journal of Agronomy and Animal Industries 16, no. 2 (2021): 129–36. http://dx.doi.org/10.22363/2312-797x-2021-16-2-129-136.

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One of the most urgent tasks in sugar beet production for Russia today is irregularities in cultivation technology and a low-efficiency crop protection. It leads to a high level of weed infestation of agricultural fields. Developing and identifying the most efficient, selective and accessible herbicides, which have low phytotoxicity, do not have a negative effect on soil chemical characteristics and can be used in sugar beet cultivation is relevant today. The aim of this study was to examine and compare biological efficiency of various doses and concentrations of one- and two-component gramini

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Bakalova, A. V., N. V. Hrytsiuk, and N. M. Tkalenko. "Special aspects of the development of black currant bushes depending on weediness level in the Ukrainian polissia." Ukrainian Journal of Ecology 10, no. 4 (2020): 18–22. http://dx.doi.org/10.15421/2020_161.

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We studied the weeds species composition in the black currantplantations of Ukrainian Polissia. The species composition of weeds has been analyzedand is was typical for thisarea. Twelve weed species were found during the study; they included annual (89.8%) and perennial ones (10.2%). A number of species were prevalent among the perennial weeds, namely common dandelion (Taraxacum officinaleWigg.) –2.5 pcs/m2, field milk thistle (Sonchus arvensisL.) –2.8 pcs/m2, couch grass (Elytrigia repensL.) –8.8 pcs/m2, and field sorrel (Rumex acetostellaL.) –3.2 pcs/m2. The most common annual species of wee

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Rakhmatulin, Ildar, and Christian Andreasen. "A Concept of a Compact and Inexpensive Device for Controlling Weeds with Laser Beams." Agronomy 10, no. 10 (2020): 1616. http://dx.doi.org/10.3390/agronomy10101616.

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A prototype of a relatively cheap laser-based weeding device was developed and tested on couch grass (Elytrigia repens (L.) Desv. ex Nevski) mixed with tomatoes. Three types of laser were used (0.3 W, 1 W, and 5 W). A neural network was trained to identify the weed plants, and a laser guidance system estimated the coordinates of the weed. An algorithm was developed to estimate the energy necessary to harm the weed plants. We also developed a decision model for the weed control device. The energy required to damage a plant depended on the diameter of the plant which was related to plant length.

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Kutt, A. S., and J. E. Kemp. "Native plant diversity in tropical savannas decreases when exotic pasture grass cover increases." Rangeland Journal 34, no. 2 (2012): 183. http://dx.doi.org/10.1071/rj11048.

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The invasion of exotic plants into savanna ecosystems can disrupt the natural pattern of vegetation. Indian couch Bothriochloa pertusa was introduced into Australia as a species for rehabilitation of degraded grazing land. In this study the effect of increasing B. pertusa cover on native plant diversity and possible mechanisms of its spread were examined. Forty sites were sampled in uncleared Queensland rangelands with a range of B. pertusa and Bothriochloa ewartiana (a native species) cover. The mean number of native species per quadrat declined with increasing B. pertusa cover but remained s

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Aronsson, Helena, Björn Ringselle, Lars Andersson, and Göran Bergkvist. "Combining mechanical control of couch grass (Elymus repens L.) with reduced tillage in early autumn and cover crops to decrease nitrogen and phosphorus leaching." Nutrient Cycling in Agroecosystems 102, no. 3 (2015): 383–96. http://dx.doi.org/10.1007/s10705-015-9712-7.

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Ariunaa, O., and M. Otgonsuren. "RESULT OF HERBICIDES APPLIED AGAINST OF WEEDS IN SOYBEAN FIELD." Mongolian Journal of Agricultural Sciences 13, no. 2 (2015): 76–79. http://dx.doi.org/10.5564/mjas.v13i2.521.

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Herbicides, if used properly, are safe and effective in controlling weeds in soybean. The choice of herbicide, however, depends on the predominant weed species and the availability of the herbicide. Chemical control is currently the most widely used control for soybean crops, due to its ease of control and to the small areas planted in Mongolia. In the soybean field the 15species of weeds belonging to 9 families, 12 genus including 62.5 % annual, 37.5%perennial weeds are distributed.The major grassy weeds; Common millet-(Panicummiliaceum L), Couch grass-(Agropyronrepens L), Bristlegrass-(Seter

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Orr, D. M., and D. G. Phelps. "Impacts of level of utilisation by grazing on an Astrebla (Mitchell grass) grassland in north-western Queensland between 1984 and 2010. 2. Plant species richness and abundance." Rangeland Journal 35, no. 1 (2013): 17. http://dx.doi.org/10.1071/rj11069.

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The occurrence of interstitial species in Astrebla grasslands in Australia are influenced by grazing and seasonal rainfall but the interactions of these two influences are complex. This paper describes three studies aimed at determining and explaining the changes in plant species richness and abundance of the interstitial species in a long-term sheep utilisation experiment in an Astrebla grassland in northern Queensland. In the first study, increasing utilisation increased the frequency of Dactyloctenium radulans (Button grass) and Brachyachne convergens (Downs couch) and reduced that of Strep

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Orr, D. M., and D. G. Phelps. "Corrigendum to: Impacts of level of utilisation by grazing on an Astrebla (Mitchell grass) grassland in north-western Queensland between 1984 and 2010. 2. Plant species richness and abundance." Rangeland Journal 36, no. 3 (2014): 309. http://dx.doi.org/10.1071/rj11069_co.

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The occurrence of interstitial species in Astrebla grasslands in Australia are influenced by grazing and seasonal rainfall but the interactions of these two influences are complex. This paper describes three studies aimed at determining and explaining the changes in plant species richness and abundance of the interstitial species in a long-term sheep utilisation experiment in an Astrebla grassland in northern Queensland. In the first study, increasing utilisation increased the frequency of Dactyloctenium radulans (Button grass) and Brachyachne convergens (Downs couch) and reduced that of Strep

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Dalinova, Anna, Leonid Chisty, Dmitry Kochura, et al. "Isolation and Bioactivity of Secondary Metabolites from Solid Culture of the Fungus, Alternaria sonchi." Biomolecules 10, no. 1 (2020): 81. http://dx.doi.org/10.3390/biom10010081.

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The fungus, Alternaria sonchi is considered to be a potential agent for the biocontrol of perennial sowthistle (Sonchus arvensis). A new chlorinated xanthone, methyl 8-hydroxy-3-methyl-4-chloro-9-oxo-9H-xanthene-1-carboxylate (1) and a new benzophenone derivative, 5-chloromoniliphenone (2), were isolated together with eleven structurally related compounds (3–13) from the solid culture of the fungus, which is used for the production of bioherbicidal inoculum of A. sonchi. Their structures were determined by spectroscopic (mostly by NMR and MS) methods. Alternethanoxins A and B, which were repor

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Veškrna, O., J. Chrpová, V. Šíp, T. Sedláček, and P. Horčička. "Reaction of wheat varieties to infection with barley yellow dwarf virus and prospects for resistance breeding." Czech Journal of Genetics and Plant Breeding 45, No. 2 (2009): 45–56. http://dx.doi.org/10.17221/32/2009-cjgpb.

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The reaction of winter and spring wheat to infection with barley yellow dwarf virus (BYDV-PAV) was evaluated in three-year small-plot field trials on 71 wheat varieties registered in the Czech Republic and at two locations for two years on 63 selected potential sources of resistance. Disease symptoms (VSS) were visually recorded using a 0&ndash;9 scale and the percent reduction of grain weight per spike (GWS-R) was measured on twenty plants per plot. The evaluation showed that among the registered varieties of winter and spring wheat no variety had a high resistance to BYDV (with VSS lower

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Riznyk, V. "Reliable protection of lentils against weeds." Karantin i zahist roslin, no. 2-3 (March 19, 2020): 53–57. http://dx.doi.org/10.36495/2312-0614.2020.2-3.53-57.

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Goal. To identify the features of the infestation of crops of lentils and improve on this basis, the elements of chemical protection from adverse impact of weeds. Methods. Field experiments were laid out in 2016—2019 according to the scheme: 1. Clogged control. 2. “Clean” control. 3. Gesagard 500 WF + Panther 4%, K. E. (3 l/ ha + 1 l/ ha). 4. Zenkor 70 WG + Targa Super, k.e. (0.6 l/ ha + 1.0 l/ ha). 5. Stomp 330, k.e. + FUSILADE Forte 150 EC, k.e. (3.0 l/ ha + 0.7 l/ ha). Results. The contamination of crops of lentils in the years of research had mixed. As a result of pre-release a

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Mitkowski, N. A. "First Report of Leaf and Sheath Spot Caused by Rhizoctonia zeae Affecting Panicum tennesseense in Rhode Island." Plant Disease 87, no. 8 (2003): 1006. http://dx.doi.org/10.1094/pdis.2003.87.8.1006c.

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Panicum tennesseense Ashe is a perennial, coarse-textured, cool-season grass (similar in appearance to many warm-seasoned grasses), which grows in the southern coastal areas of New England and is commonly found in home lawns, roadsides, and meadows. In August 2002, a large stand of P. tennesseense with significant leaf spotting was identified in Washington County, RI. Lesions were excised, surface sterilized with 0.6% sodium hypochlorite, and plated on one-half-strength potato dextrose agar (PDA). Cultures were incubated at 25°C, and mycelia quickly covered plates within 3 days. After 2 weeks

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