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Journal articles on the topic 'Pasture plants Physiology'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Hewitt, George B., and Jerome A. Onsager. "EFFECTS OF SAGEBRUSH REMOVAL AND LEGUME INTERSEEDING ON RANGELAND GRASSHOPPER POPULATIONS (ORTHOPTERA: ACRIDIDAE)." Canadian Entomologist 120, no. 8-9 (September 1988): 753–58. http://dx.doi.org/10.4039/ent120753-8.

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AbstractGrasshopper density and species composition were determined from 1982 to 1985 in four 75-ha pastures in the northern mixed prairie region near Miles City, MT. Treatment in two pastures consisted of sagebrush removal and interseeding alfalfa and cicer milkvetch. Two pastures were not treated. The treated pastures were grazed only half as long as the untreated pastures but with twice the number of steers. Forage yield decreased in all pastures from 1983 to 1985 because of below-average precipitation and grasshopper density increases. In one pasture, 10% of the legume seedlings were destr

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García-Favre, Javier, Ignacio F. López, Lydia M. Cranston, Daniel J. Donaghy, and Peter D. Kemp. "The Growth Response of Pasture Brome (Bromus valdivianus Phil.) to Defoliation Frequency under Two Soil-Water Restriction Levels." Agronomy 11, no. 2 (February 8, 2021): 300. http://dx.doi.org/10.3390/agronomy11020300.

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Pasture brome (Bromus valdivianus Phil.) has the potential to increase current levels of herbage production and pasture persistence in New Zealand dryland, well-drained soils. However, there is little literature on the effect of defoliation management on growth of this grass under contrasting soil-water restriction levels. The growth physiology and performance of pasture brome were evaluated in pots in a glasshouse. Defoliation frequency (DF) treatments were applied based on three different accumulated growing degree-days (AGDD): 250, 500 and 1000 AGDD (high, medium, and low DF). At end of the

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3

Moro, Adriana L., Ana Claudia Pacheco, and Edemar Moro. "Physiological and Biochemical Alterations of Urocholoa brizantha Submitted to Water Deficit and Silicate Fertilization." Journal of Agricultural Science 10, no. 8 (July 10, 2018): 166. http://dx.doi.org/10.5539/jas.v10n8p166.

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The correction of soil acidity and the evaluation of the effects of correctives used are not frequent practices in pasture areas. The benefits of silicon on the physiology and biochemistry of pastures is a subject that has not been explored in great detail. The objective of this study was to evaluate the performance of Urochloa brizantha plants (cultivar Xaraés) submited to condictions of water deficity and silicate fertilization through physiological and biochemical parameters. The experiment was carried out in pots under greenhouse conditions..The experimental design was randomized blocks, i

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Premazzi, Linda Monica, Francisco Antonio Monteiro, and José Eduardo Corrente. "Tillering of Tifton 85 bermudagrass in response to nitrogen rates and time of application after cutting." Scientia Agricola 60, no. 3 (2003): 565–71. http://dx.doi.org/10.1590/s0103-90162003000300023.

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Nitrogen fertilization is determinant for pasture productivity, as it results in increasing forage yield and is associated with the growth physiology of forage plants. An experiment was carried out in a greenhouse to evaluate the effects of nitrogen rates and times of application after cutting on Tifton 85 Bermuda grass (Cynodon spp.) tillering. Plants were grown in a Typic Quartzipsamment soil and nitrogen rates were 0, 80, 160 and 240 mg kg-1 of soil; times of application were immediately after and seven days after cutting. A 4 x 2 factorial experiment was set in a completely randomized bloc

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Perera, Cullen, and Eckard. "Growth and Physiological Responses of Temperate Pasture Species to Consecutive Heat and Drought Stresses." Plants 8, no. 7 (July 16, 2019): 227. http://dx.doi.org/10.3390/plants8070227.

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Heat and drought are two major limiting factors for perennial pasture production in south eastern Australia. Although previous studies have focused on the effects of prolonged heat and drought stresses on pasture growth and physiology, the effects of short term recurring combined heat and drought stresses and the recovery from them have not been studied in detail. A controlled environment experiment was conducted to investigate the growth and physiological responses of perennial ryegrass (Lolium perenne L.), cocksfoot (Dactylis glomerata L.), tall fescue (Festuca arundinacea Schreb.) and chico

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Chapman, D. F., J. M. Lee, and G. C. Waghorn. "Interaction between plant physiology and pasture feeding value: a review." Crop and Pasture Science 65, no. 8 (2014): 721. http://dx.doi.org/10.1071/cp13379.

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Plant–animal interactions impact on all elements of pasture and animal performance in grazing systems. The quality of pastures for animals can be described in terms of feeding value (FV), which is a combination of feed nutritive value (NV) and voluntary intake. There are numerous complex interactions between plant physiology and pasture FV and NV. This review focuses on these interactions in four key areas (plant growth strategies, phenological development, pasture regrowth, and response to environmental stress), extracting key principles and illustrating how plant breeding or management may b

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Casal, Jorge J., and Sureshkumar Balasubramanian. "Thermomorphogenesis." Annual Review of Plant Biology 70, no. 1 (April 29, 2019): 321–46. http://dx.doi.org/10.1146/annurev-arplant-050718-095919.

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When exposed to warmer, nonstressful average temperatures, some plant organs grow and develop at a faster rate without affecting their final dimensions. Other plant organs show specific changes in morphology or development in a response termed thermomorphogenesis. Selected coding and noncoding RNA, chromatin features, alternative splicing variants, and signaling proteins change their abundance, localization, and/or intrinsic activity to mediate thermomorphogenesis. Temperature, light, and circadian clock cues are integrated to impinge on the level or signaling of hormones such as auxin, brassi

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Martinez, Carlos Alberto, Eduardo Augusto Dias de Oliveira, Tathyana Rachel Palo Mello, and Ana Lilia Alzate-Marin. "Respostas das plantas ao incremento atmosférico de dióxido de carbono e da temperatura (Plants responses to increase in atmospheric carbon dioxide and temperature)." Revista Brasileira de Geografia Física 8 (December 15, 2015): 635. http://dx.doi.org/10.26848/rbgf.v8.0.p635-650.

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Existem fortes evidencias da ocorrência de mudanças climáticas globais por causa do aumento de gases de efeito estufa, as quais provavelmente serão cada vez mais severas no futuro. Para enfrentar esse problema, as plantas, serão confrontadas com opções limitadas para evitar a perda de seu hábitat ou extinção: adaptar-se, migrar ou morrer. Em geral, o aumento da concentração atmosférica do CO2 atuando como “fertilizante” para a fotossíntese poderia aumentar o crescimento e a produção de biomassa das plantas. No entanto, o aumento da temperatura global poderia afetar negativamente a fisiologia e

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9

Kemp, PD, and GJ Blair. "Phosphorus efficiency in pasture species. VIII. Ontogeny, growth, P acquisition and P utilization of Italian ryegrass and phalaris under P deficient and P sufficient conditions." Australian Journal of Agricultural Research 45, no. 3 (1994): 669. http://dx.doi.org/10.1071/ar9940669.

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The P efficiency of Italian ryegrass (Lolium multiflorum Lamk. cv Grasslands Tama) and phalaris (Phalaris aquatica L. cv Sirosa) was compared on both a temporal and ontogenetic basis. As ontogeny and growth are interrelated, such a comparison allowed the growth and physiological responses to P level of the two species to be separated from responses due to the species being at different ontogenetic stages at the time of comparison. Plants were grown from seed through to anthesis under P deficient and P sufficient conditions in soil in a glasshouse. The ontogenies of Italian ryegrass and phalari

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Silveira Júnior, Otacilio, Antonio Clementino dos Santos, Marcos Odilon Dias Rodrigues, Márcio Odilon Dias Rodrigues, and Nayara Martins Alencar. "Productive efficiency of mombasa grass in silvopastoral system under pasture deferment and nitrogen fertilizer." Semina: Ciências Agrárias 38, no. 5 (October 3, 2017): 3307. http://dx.doi.org/10.5433/1679-0359.2017v38n5p3307.

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This study aimed to evaluate the efficiency of Mombasa grass in a silvopastoral system and submitted to different nitrogen fertilization rates and pasture management strategies. Treatments consisted of four nitrogen fertilizer doses (0.0, 125.0, 187.5, and 250.0 kg N ha-1 year-1) and three cutting heights (70, 90, and 105 cm). Plant agronomic and physiologic efficiencies, as well as nitrogen use and accumulation by plants, forage production, and increments of forage production, were verified for the application of nitrogen fertilizer. Nitrogen fertilization was only efficient for grasses cut a

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11

Edwards, G. R., P. C. D. Newton, J. C. Tilbrook, and H. Clark. "Seedling performance of pasture species under elevated CO2." New Phytologist 150, no. 2 (May 2001): 359–69. http://dx.doi.org/10.1046/j.1469-8137.2001.00100.x.

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12

Oliveira, M. A. P., U. R. Antuniassi, E. D. Velini, R. B. Oliveira, J. F. Salvador, A. C. A. Silva, A. A. B. Mota, Z. N. Figueiredo, and R. S. Boiani. "Influence of spray mixture volume and flight height on herbicide deposition in aerial applications on pastures." Planta Daninha 32, no. 1 (March 2014): 227–32. http://dx.doi.org/10.1590/s0100-83582014000100025.

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The objective of the present study was to analyze the influence of spray mixture volume and flight height on herbicide deposition in aerial applications on pastures. The experimental plots were arranged in a pasture area in the district of Porto Esperidião (Mato Grosso, Brazil). In all of the treatments, the applications contained the herbicides aminopyralid and fluroxypyr (Dominum) at the dose of 2.5 L c.p. ha-1, including the adjuvant mineral oil (Joint Oil) at the dose of 1.0 L and a tracer to determine the deposition by high-performance liquid chromatography (HPLC) (rhodamine at a concentr

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13

Lascano, Carlos E., Juan E. Carulla, and Juan De Jesus Vargas. "Strategies for Reducing Methane Emissions from Ruminants (Estratégias para a Redução da Emissão de Metano por Ruminantes)." Revista Brasileira de Geografia Física 4, no. 6 (April 19, 2012): 1315. http://dx.doi.org/10.26848/rbgf.v4i6.232794.

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Há fortes evidências que as atividades humanas estão afetando o clima global por meio da produção de Gases de Efeito Estufa (GEE), dos quais o metano (CH4) tem elevado potencial de aquecimento. A fermentação entérica e o esterco dos ruminantes representam cerca de 30 a 40% do total das emissões antropogênicas de CH4. Este artigo traz um resumo de tecnologias existentes para reduzir as emissões de CH4 entéricas dos ruminantes, com ênfase à manipulação dietética e ruminal, à seleção/reprodução animal e à melhoria dos sistemas de produção. As diferenças na produção de CH4 entérica entre as espéci

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14

Legée, Georgette. "La physiologie dans l'oeuvre de Jean Senebier (1742-1809." Gesnerus 48, no. 3-4 (November 25, 1991): 307–22. http://dx.doi.org/10.1163/22977953-0480304006.

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D’une famille française réfugiée à Genève au XVIe siècle, Jean Senebier fut successivement pasteur à Chancy, puis bibliothécaire à Genève. Charles Bonnet lui révéla sa veritable voie qui était naturaliste. II l'incita à traduire oeuvre expérimentale de Spallanzani. A son époque, la chimie des gaz faisait de grands progrès. Senebier eut le mérite d’appliquer cette chimie à Vetude des échanges gazeux de la plante. II apporta une contribution importante, tant au point de vue métkodologique qu’au point de vue physiologique.

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15

WOLFENDEN, J., and P. J. DIGGLE. "Canopy gas exchange and growth of upland pasture swards in elevated CO2." New Phytologist 130, no. 3 (July 1995): 369–80. http://dx.doi.org/10.1111/j.1469-8137.1995.tb01831.x.

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16

RH, Adams, AL 羖varez-Ovando, and G. Casta耋n N. "Effect of hydrocarbon concentration of pasture production (Brachiaria humidicola) in Texistepec, Veracruz." Phyton 84, no. 1 (2015): 222–32. http://dx.doi.org/10.32604/phyton.2015.84.222.

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17

Dias-Filho, Moacyr B., and Aloisio F. Chagas Júnior. "Growth, biomass allocation and photosynthesis of Rolandra fruticosa (asteraceae) in response to shade." Planta Daninha 18, no. 1 (2000): 71–80. http://dx.doi.org/10.1590/s0100-83582000000100007.

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The effects of shade on growth, biomass allocation patterns and photosynthetic response was examined for Rolandra fruticosa (L.) Kuntze, a common perennial weed shrub in cultivated pastures and agricultural areas of Brazilian Amazonia, for plants grown in full sunlight and those shaded to 30 % of full sunlight over a 34-d period. Specific leaf area and leaf area ratio were higher for shade plants during all the experimental period. Shade plants allocated significantly less biomass to root tissue than sun plants and relative growth rate was higher in sun plants. Sun leaves had significantly hig

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18

Silva, C. E. M., J. F. C. Goncalves, and E. G. Alves. "Photosynthetic traits and water use of tree species growing on abandoned pasture in different periods of precipitation in Amazonia." Photosynthetica 49, no. 2 (June 1, 2011): 246–52. http://dx.doi.org/10.1007/s11099-011-0033-z.

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19

Baxter, R., M. Gantley, T. W. Ashenden, and J. F. Farrar. "Effects of elevated carbon dioxide on three grass species from montane pasture II. Nutrient uptake, allocation and efficiency of use." Journal of Experimental Botany 45, no. 9 (1994): 1267–78. http://dx.doi.org/10.1093/jxb/45.9.1267.

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20

Soussana, J. F., A. I. Graux, and F. N. Tubiello. "Improving the use of modelling for projections of climate change impacts on crops and pastures." Journal of Experimental Botany 61, no. 8 (April 21, 2010): 2217–28. http://dx.doi.org/10.1093/jxb/erq100.

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21

REIS, F. C., J. B. CASON, R. E. B. TOLEDO, J. F. SOTOMAYOR, M. M. FREITAS, and R. VICTÓRIA FILHO. "Aminocyclopyrachlor: New Option for Trumpet Flower Control in Pastures." Planta Daninha 34, no. 4 (December 2016): 759–64. http://dx.doi.org/10.1590/s0100-83582016340400016.

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ABSTRACT The species Tecoma stans, introduced to Brazil to be cultivated in urban centers as street trees, in parks and gardens, became important pasture weed. The mechanical control of this species is difficult because the plant presents a large number of sprouts when are mowed. Furthermore, the herbicides usually used in pasture have been shown to be inefficient to control it. This research evaluated the trumpet flower control effectiveness using a new herbicide (aminocyclopyrachlor) applied alone in increasing doses to the cut stump for the control of resprouts and mixed with metsulfuron-me

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Jose, J., R. Montes, N. Nikonova, J. Grace, and C. Buendia. "Effect of the replacement of a native savanna by an African Brachiaria decumbens pasture on the CO₂ exchange in the Orinoco lowlands, Venezuela." Photosynthetica 52, no. 3 (September 1, 2014): 358–70. http://dx.doi.org/10.1007/s11099-014-0039-4.

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BAREA, J. M., R. AZCOZ, and C. AZCON-AGUILAR. "Time-course of N2-fixation (15N) in the field by clover growing alone or in mixture with ryegrass to improve pasture productivity, and inoculated with vesicular-arbuscular mycorrhizal fungi." New Phytologist 112, no. 3 (July 1989): 399–404. http://dx.doi.org/10.1111/j.1469-8137.1989.tb00329.x.

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BRAUNBERGER, P. G., L. K. ABBOTT, and A. D. ROBSON. "The effect of rain in the dry-season on the formation of vesicular-arbuscular mycorrhizas in the growing season of annual clover-based pastures." New Phytologist 127, no. 1 (May 1994): 107–14. http://dx.doi.org/10.1111/j.1469-8137.1994.tb04264.x.

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Byers, J. R. "WOOLLY-BEAR CATERPILLARS OF GRAMMIA BLAKEI (GRT.) (LEPIDOPTERA: ARCTIIDAE) — AN OCCASIONAL PEST OF NATIVE RANGE PASTURES AND ADJACENT CROPS IN SOUTHERN ALBERTA AND SOUTHWESTERN SASKATCHEWAN." Canadian Entomologist 120, no. 10 (October 1988): 927–35. http://dx.doi.org/10.4039/ent120927-10.

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AbstractThe woolly-bear caterpillars of Grammia (= Apantesis) blakei (Grt.) are sometimes abundant on native range pastures in the short-grass region of southern Alberta and southwestern Saskatchewan and occasionally cause early season damage to adjacent cultivated crops. The larvae overwinter as mid- to late-instars in protected sites on the soil surface and begin feeding in the spring as soon as new plant growth is available. They are general feeders on both mono- and dicotyledonous plants. Larval densities exceeding 10/m2 were found at several locations from 1982 to 1985 and historical reco

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Dias-Filho, Moacyr B. "Potential for seed bank formation of two weed species from Brazilian Amazonia." Planta Daninha 17, no. 2 (August 1999): 183–88. http://dx.doi.org/10.1590/s0100-83581999000200002.

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The potential for seed bank formation of two perennial weed species, Ipomoea asarifolia (Desr.) Roem. & Schult. (Convolvulaceae) and Stachytarpheta cayennensis (Rich.) M. Vahl (Verbenaceae), both common in Amazonia , was evaluated in a degraded pasture area in eastern Brazilian Amazonia . Seeds were enclosed in nylon mesh packets and placed at the soil surface or buried at 5 or 10 cm deep. The number of viable seeds was recorded at 6, 10, 14 and 18 months after burial. Results showed that S. cayennensis has the ability to form persistent soil seed bank, while I. asarifolia seeds do not bui

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FIPKE, M. V., and R. A. VIDAL. "Integrative Theory of the Mode of Action of Quinclorac: Literature Review1." Planta Daninha 34, no. 2 (June 2016): 393–402. http://dx.doi.org/10.1590/s0100-83582016340200020.

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ABSTRACT Quinclorac is a systemic herbicide absorbed by germinating seeds, roots and leaves of seedlings. It is a selective compound for crops such as rice, canola, barley, corn, sorghum, and pasture. Quinclorac can be used to control various monocots and dicotyledonous weed species. The biochemical function of this herbicide in the plant has intrigued scientists for nearly four decades. The objectives of this review are to present evidence of three hypotheses on the biochemical functioning of quinclorac and to propose an integrative mode of action. The first theory on the mode of action of qu

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Burgess, L. W., Paul E. Nelson, T. A. Toussoun, and G. A. Forbes. "Distribution of Fusarium Species in Sections Roseum, Arthrosporiella, Gibbosum and Discolor Recovered from Grassland, Pasture and Pine Nursery Soils of Eastern Australia." Mycologia 80, no. 6 (November 1988): 815–24. http://dx.doi.org/10.1080/00275514.1988.12025729.

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Burgess, L. W., Paul E. Nelson, T. A. Toussoun, and G. A. Forbes. "Distribution of Fusarium Species in Sections Roseum, Arthrosporiella, Gibbosum and Discolor Recovered from Grassland, Pasture and Pine Nursery Soils of Eastern Australia." Mycologia 80, no. 6 (November 1988): 815. http://dx.doi.org/10.2307/3807560.

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Fielding, Dennis J., M. A. Brusven, Bahman Shafii, and William J. Price. "Spatial heterogeneity of low-density populations of Melanoplus sanguinipes (Orthoptera: Acrididae) associated with grazing and vegetation treatments." Canadian Entomologist 133, no. 6 (December 2001): 843–55. http://dx.doi.org/10.4039/ent133843-6.

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AbstractThe objectives of this study were to determine whether the spatial distribution of Melanoplus sanguinipes F., the most abundant species of grasshopper on rangeland in southern Idaho, varied annually in response to changing patterns of grazing and to investigate how vegetation affects the spatial distribution of low-density populations of M. sanguinipes at scales relevant to most rangeland-management activities. A lattice of 72 sites was established across nine pastures, covering approximately 5000 ha. At each site, densities of M. sanguinipes, percent canopy coverage by plant species,

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Nesrine, Lenchi, Kebbouche Salima, Khelfaoui Mohamed Lamine, Laddada Belaid, BKhemili Souad, Gana Mohamed Lamine, Akmoussi Sihem, and Ferioune Imène. "Phylogenetic characterization and screening of halophilic bacteria from Algerian salt lake for the production of biosurfactant and enzymes." World Journal of Biology and Biotechnology 5, no. 2 (August 15, 2020): 1. http://dx.doi.org/10.33865/wjb.005.02.0294.

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Environments containing significant concentration of NaCl such as salt lakes harbor extremophiles microorganisms which have a great biotechnology interest. To explore the diversity of Bacteria in Chott Tinsilt (Algeria), an isolation program was performed. Water samples were collected from the saltern during the pre-salt harvesting phase. This Chott is high in salt (22.47% (w/v). Seven halophiles Bacteria were selected for further characterization. The isolated strains were able to grow optimally in media with 10–25% (w/v) total salts. Molecular identification of the isolates was performed by

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RODRIGUES, D. A., G. A. M. PEREIRA, A. A. SILVA, M. H. SANTOS, A. J. DEMUNER, and P. M. OLIVEIRA. "Phytochemical Profile of Pasture Weeds from the Brazilian Cerrado." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100028.

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ABSTRACT: The great diversity of plant species in pastures of the Brazilian Cerrado with distinct ecophysiological characteristics indicates the possibility of finding, in the cellular content of this flora, chemical compounds with potential for use in agriculture and human and animal health. Three steps are necessary to prove this hypothesis: phytochemical prospecting, characterization of secondary metabolites, and studies on the biological activities of these metabolites present in these plants. The chemical profile of secondary metabolites present in five species of the Brazilian Cerrado (D

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BELLÉ, J. R., S. R. MARCHI, D. MARTINS, A. C. SOUSA, and G. H. R. PINHEIRO. "Nutritional Value of Marandú Palisade Grass According to Increasing Coexistence Periods with Weeds." Planta Daninha 36 (September 3, 2018). http://dx.doi.org/10.1590/s0100-83582018360100070.

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ABSTRACT: This research aimed at evaluating the effect of increasing coexistence periods with weeds on the nutritional components of the forage grass Brachiaria brizantha cv. Marandú under pasture renewal conditions. The experiment was arranged in randomized blocks with four replications, and treatments were represented by eight coexistence periods, namely: 0, 15, 30, 45, 60, 75, 90 and 120 days after seedling emergence. A phytosociologic evaluation was performed on the weed community at the end of the coexistence periods; later, weeds were eliminated by an herbicide formulated with aminopyral

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MARCHI, S. R., H. M. SILVA, C. F. FERREIRA, R. F. MARQUES, and J. B. MORAES. "Interference of Noxious Shrubs on Grazing Behavior by Bovines." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100009.

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ABSTRACT: The grazing behavior practice by bovines can be positive or negatively influenced by the pasture structure where the animal is inserted. Several factors determine the pasture structure and the presence of weeds is considered one of the most important. This study aimed to assess the effect of species with and without stiff structures over the grazing behavior of bovines in pasture areas. The experimental design was a split block design with four replications, in which treatments were arranged in a 4 x 3 factorial design: four weed species (Zanthoxylum rhoifolium, Cnidoscolus urens, Da

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DIAS, R. C., M. V. SANTOS, E. A. FERREIRA, T. G. S. BRAZ, L. V. FIGUEIREDO, P. J. R. CRUZ, and L. D. SILVA. "Phytosociology in Degraded and Renewed Pastures in Agrosilvopastoral Systems." Planta Daninha 36 (September 3, 2018). http://dx.doi.org/10.1590/s0100-83582018360100075.

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ABSTRACT: In pastures, the incidence of weeds reduces the productivity and quality of forage. The identification of the weed species in pastures is fundamental to choose the renewal method. Thus, the objective of this work was to perform phytosociology before and after the renewal of a Brachiaria decumbens pasture, with the implantation of agrosilvopastoral systems. Eighteen different crop arrangements for pasture renewal were evaluated. The renewal systems were by eucalyptus integration (at 12 x 2 m or 12 x 3 m spacings) with maize, Brachiaria brizantha cv. Marandu (palisade grass) and/or Mac

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BERSELI, C., J. A. M. BONO, S. A. SANTOS, F. A. R. PEREIRA, and J. F. REIS NETO. "Economic Injury Level of Canjiqueira in Native Pastures in Pantanal of Nhecolândia." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100112.

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ABSTRACT: Pantanal plain has large extensions of land formed by many types of landscapes suitable to extensive livestock system. Open grasslands and lowlands are formed by forage such as grasses and forbs widely consumed by cattle. However, climatic and human factors can promote the dissemination of invasive shrub species such as canjiqueira (Byrsonima cydoniifolia A. Juss) making it necessary, in many cases, the human intervention to control the invasion. The present work had as objective to determine the economic threshold level to control canjiqueira through two methods: tractor driven blad

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MARTINS, D. A., A. JAKELAITIS, L. S. PEREIRA, L. M. F. MOURA, and K. C. GUIMARÃES. "Intercropping Between Corn and Urochloa brizantha Managed with Mesotrione Underdoses." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100056.

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ABSTRACT: Corn and forage intercropping system has been commonly used for pasture establishment or renewal. In addition, the use of reduced doses of herbicides selective to corn has facilitated coexistence by reducing competitiveness against forage species. This study aimed to evaluate the effects of mesotrione underdoses in a corn and Urochloa brizantha intercropping on weed population dynamics, corn yield, and forage performance and nutritional quality. For this purpose, five mesotrione doses were tested (0.0, 9.6, 19.2, 38.4, and 57.6 g ha-1) in corn and forage intercropping and monoculture

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SCHEFFER-BASSO, S. M., F. Jr R. FIORENTIN, and A. FAVARETTO. "Influence of Phenology and Post-Harvest Processing of Vegetal Material on the Allelopathy of Annoni Grass (Eragrostis plana) Extracts." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100013.

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ABSTRACT: The phenological stage, post-harvest processing and quantity of material can interfere in the allelopathic activity of extracts. The objective of this study is to test the allelopathic effect of aqueous extracts of the leaves of Annoni grass (Eragrostis plana), an invader of natural pastures. Twelve extracts were prepared by combining the phenological stage of the plants when harvesting the leaves (vegetative; flowering), post-harvest processing before extraction (fresh; dry at 40 oC), and the amount of plant material (5, 15, and 25 g 100 mL-1 distilled water). Two bioassays were con

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LOURENÇO, A. A., R. V. MOTA, J. L. SANCHES, R. F. MARQUES, and S. R. MARCHI. "Weed Interference in the Establishment of Urochloa ruziziensis." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100077.

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ABSTRACT: This research aimed to study weed interference relationship on morphogenesis, yield, and greenhouse gas production potential of Urochloa ruziziensis under pasture renovation conditions. The experimental design was a randomized block design with four replications. Treatments consisted of seven coexistence periods: 0, 15, 30, 45, 60, 75, and 90 days after emergence (DAE). The following morphological parameters were analyzed: number of tillers, number of leaves, photosynthetically active leaf blade biomass, fresh stem biomass, dead material biomass, and total dry biomass. In vitro analy

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KRUCHELSKI, S., L. S. SZYMCZAK, L. DEISS, and A. MORAES. "Panicum maximum cv. Aries Establishment under Weed Interference with Levels of Light Interception and Nitrogen Fertilization." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100011.

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ABSTRACT: The aim of this study was to evaluate the establishment of the pasture of Panicum maximum cv. Aries in an environmentally protected area under levels of interspecific interaction with the weed community. The experiment started after sowing P. maximum, and it was carried out in a randomized block design with four replications and the following factors: 3 light interception levels, 2 nitrogen rates, and 7 weekly sampling dates along pasture establishment (3x2x7). The light interception treatments, determined by photosynthetically active radiation, were given by mowing weeds over the ca

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RAMOS, C. J. B., R. R. FONSECA, A. P. S. SOUZA FILHO, and V. L. TEIXEIRA. "Inhibitory Effects of the Lipophilic Extracts and An Isolated Meroditerpene of Brown Alga in Pasture Weeds in the Eastern Amazon Region." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100127.

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ABSTRACT: Two lipophilic extracts and atomaric acid (1), an isolated natural product, were obtained from the marine brown alga Stypopodium zonale (Dictyotaceae) to identify and characterize their potential inhibitory effects on the seed germination, radicle elongation, and hypocotyl development of the weeds Mimosa pudica and Senna obtusifolia. The extracts were prepared with hexane and dichloromethane, and atomaric acid (1) was isolated from hexane extract by way of conventional chromatographic methods. During a 15 days period, germination bioassays were performed at 25 oC with a 12 h photoper

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NISHIMUTA, H. A., A. A. B. ROSSI, O. M. YAMASHITA, G. F. PENA, P. H. A. D. SANTOS, L. D. GIUSTINA, and F. S. ROSSI. "Leaf and Root Allelopathic Potential of the Vernonanthura brasiliana." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100142.

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ABSTRACT: The Brazilian native weed assa-peixe (Vernonanthura brasiliana) is considered one of the main invasive plant species of pasture areas in the Amazon. It is thus necessary to know their biology and their behavior in the environment, and to enhance the development of management strategies, minimizing the use of herbicides. The objective of this study was to test the allelopathic effect on the germination and growth of the bioindicator species Lactuca sativa from leaf and root extracts obtained from fresh and dry V. brasiliana. The experiment consisted of six treatments with concentratio

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RAMOS, M. F. T., R. T. S. SANTOS, D. P. ALMEIDA, J. F. D. VECHIA, and M. C. FERREIRA. "Effect of Pesticide Addition Sequence on the Preparation of Phytosanitary Spray Solutions." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100075.

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ABSTRACT: The addition of adjuvants to herbicide solutions is aimed at preserving or enhancing the biological effect of treatment. However, it is commonly performed without knowledge of the physicochemical interactions between products. This study aimed to assess the effects of different addition sequences of the herbicide aminopyralid + fluroxypyr and adjuvants in the preparation of phytosanitary spray solutions on the surface tension and contact angle. Two experiments were carried out with herbicide doses of 1 and 2 L ha-1 associated with the adjuvants mineral oil (MO), silicone-polyether co

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MARQUES, A. S., S. R. MARCHI, G. H. R. PINHEIRO, R. F. MARQUES, and C. C. MARTINS. "Emergence of Razor Grass on the Basis of Origin and Seed Depth in the Soil Profile." Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100126.

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ABSTRACT: Razor grass (Paspalum virgatum L) is one weed that has gain importance because of its high seed production capability, mainly when pasture fields need to be renewed. Understanding seedling emergence behavior is crucial to devise strategies to manage this weed. This trial was carried out to evaluate the emergence pattern of razor grass seedlings on the basis of seed depth in the soil profile. The experiment was conducted in a green-house in a completely randomized design, with six replications. The treatments performed in a 11 x 3 factorial arrangement: eleven seeding depths (surface,

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