Nível crítico de dano de papuã em feijão-comum

Kalsing, Augusto; Vidal, Ribas Antônio

doi:10.1590/s0100-83582013000400010

Cited by 17 publications

(46 citation statements)

References 19 publications

(16 reference statements)

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“…The plant of Urochloa plantaginea (Brachiaria plantaginea) is a grass weed with annual life cycle and reproduction by seeds. The plants of this species are among the most competitive with the common bean crop reducing the dry mass by 97% (Cury et al, 2011) and the grain yield by 96% (Kalsing and Vidal, 2013).…”

Section: Introductionmentioning

confidence: 99%

Fluazifop-P-Butyl Efficacy as a Function of Application Time and Herbicide Dose

et al. 2017

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-Grass weeds are common in summer crops and strongly decreases the grain yield of the common bean crop. The time of herbicide application influences the variability of environmental conditions and affects the product performance. The objectives of this work were to identify the time of fluazifop-p-butyl (fluazifop) application which gives best grass weed control in the common bean crop and to elucidate the environmental variables most important for the efficacy of this herbicide. Field experiments were conducted involving five application times (2 a.m., 6 a.m., 11 a.m., 4 p.m. and 9 p.m.) and five doses of fluazifop (80, 110, 140, 170 and 200 g ha -1 ), with additional no-herbicide control. At the time of the herbicide application it was determined the air temperature, relative humidity, the photosynthetically active radiation (PAR) and the leaf angle, whereas the weed control and the dry mass of the weed Urochloa plantaginea was assessed at 20 days after treatment (DAT). Efficacy on grass control with fluazifop was dependent on the herbicide dose and on the time of day that the product was applied. Spray at early morning hours (6 a.m.) showed better efficacy on weed control in relation to periods during warmer conditions of the day (11 a.m. and 4 p.m.). Nocturnal fluazifop application had better weed control when compared to herbicide sprayed in the afternoon. The air temperature, relative humidity and PAR were correlated to weed leaf angle, which correlated the most with fluazifop performance.Keywords: chemical control, environmental conditions, leaf angle, conceptual map. de aplicação (2h, 6h, 11h, 16h e 21h) e cinco doses de fluazifop (80, 110, 140, 170 RESUMO -Gramíneas são infestantes comuns nos cultivos de verão e causam grande prejuízo à cultura do feijão. O horário de aplicação do herbicida influencia nas condições ambientais, alterando o desempenho do produto. Este trabalho teve como objetivos identificar o horário de aplicação de fluazifop-p-butyl (fluazifop) que confere melhor desempenho ao herbicida no controle de gramíneas na cultura do feijão e elucidar as variáveis ambientais mais importantes para a eficácia desse herbicida. Foi conduzido um experimento em campo envolvendo cinco horários

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Section: Introductionmentioning

confidence: 99%

Fluazifop-P-Butyl Efficacy as a Function of Application Time and Herbicide Dose

et al. 2017

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“…From the many tools available to study competition between plants in a community, the nonlinear equation of the rectangular hyperbola. This model relates the crop's losses in productivity using the variables population, dry mass, ground cover, and leaf area from the weeds (Agostinetto et al, 2010;Kalsing and Vidal, 2013). The hyperbola model contains parameters (i and a) that present biological agronomic meaning, which can be used as a competitiveness rate (Cousens, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…However, at the present time, more sustainable production models are pursued in order to lessen the environmental impact over the agroecosystems, the residue risk in the food and intoxications on the people involved in agricultural activities. With this in mind, the herbicide application based on the concept of economic threshold level (ETL) predicts the use of the seed control method when the damage caused by the weeds is higher than the cost of the control method (Agostinetto et al, 2010;Vidal et al, 2010;Kalsing and Vidal, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Interference and Economic Threshold Level for Control of Beggartick on Bean Cultivars

et al. 2016

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-The aim of the study was to assess the interference and determine the economic threshold level of beggartick damage on bean crops. Treatments consisted of bean cultivars (IPR Uirapuru, BRS Supremo, BRS Campeiro, Fepagro 26, BRS Esplendor and IPR Tuiuiú) submitted to competition with ten beggartick populations. We evaluated plant population, leaf area, ground cover and shoot dry mass of beggartick. Dry mass of shoots of beggartick fitted better to the hyperbolic model, and grain yield losses due to beggartick interference were estimated satisfactorily by this model. BRS Esplendor and IPR Tuiuiú were more competitive than the others in the presence of beggartick. Sowing of BRS Esplendor, IPR Tuiuiú and Fepagro 26 increases the level of economic damage, justifying the adoption of control measures only for higher densities of beggartick. Increase in grain yield, commercial price of beans, herbicide efficiency and reduction in control cost decrease the threshold level for weed control, justifying application of control measures for lower densities of beggartick. Keywords: Phaseolus vulgaris, Bidens pilosa, interference. RESUMO -Objetivou-se com este trabalho avaliar a interferência e determinar o nível de dano econômico de picão-preto infestante da cultura do feijão. Os tratamentos foram compostos por cultivares de feijão (IPR Uirapuru, BRS Supremo, BRS Campeiro, Fepagro 26, BRS Esplendor e IPR

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“…The search for preemergent herbicides that can be used in tank mixture with glyphosate may reduce the constant need of post-emergence applications. The mixtures with glyphosate provide a residual effect that will prevent or delay the first emergency flow, keeping the weeds in a favorable stage to do a post-emergence control (Kalsing and Vidal, 2013;Oliveira Neto et al, 2013). In addition to delaying the period before the interference (PBI), a period in which the weed-crop competition is not initialized.…”

Section: Introductionmentioning

confidence: 99%

A Multy-Year Study Reveals the Importance of Residual Herbicides on Weed Control in Glyphosate-Resistant Soybean

et al. 2018

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-A 3-year field study was conducted to assess the potential for using pre-emergent (PRE) herbicides tank mixed with glyphosate as a means of controlling weed species in soybean. In 2011/12, 2012/13 and 2013/14 growing sessions soybean cultivar Brasmax Apollo RR was planted under residues of rye. The herbicide treatments glyphosate (gly) (1,296 g a.i. ha -1 ), gly + S-metolachlor (1,296 + 1,920), gly + imazaquin (1,296 +161), gly + pendimethalin (1,296 + 1,000), gly + metribuzin (1,296 + 480), gly + 2.4-D amine (1,296 + 1,209) was applied in pre-emergence (PRE) over rye crop residues two days before soybean sowing. In addition, full season weed-free and weedy control plots were included. Gly + S-metolachlor and gly + pendimethalin reduced the horseweed density from 48 to 3 and 6 plants m -2 , respectively. The mix containing gly + metribuzin and gly + 2.4-D amine and gly applied alone had no effect in the horseweed control. The mix containing gly + metribuzin, gly + 2.4-D amine, gly + imazaquin and gly applied alone had no effect in the crabgrass control. In contrast gly + S-metolachlor and gly + pendimethalin reduced the crabgrass density from 70 to 0 and 1 plant m -2 , respectively. The soybean yield was higher with weed-free, S-metolachlor and metribuzin treatments. The use of an herbicide with residual effect had impact on weed management and soybean yield. In conclusion, a greater control of horseweed and crabgrass occurred when S-metolachlor or pendimethalin was applied PRE.Keywords: Glycine max; 2.4-D; metribuzin; S-metolachlor; Conyza spp. 2011/12, 2012/13 e 2013/14, o RESUMO -Um estudo de campo de três safras foi conduzido para avaliar o potencial de uso de herbicidas pré-emergentes misturados com glyphosate como meio de controlar as espécies de plantas daninhas na cultura da soja. Nas safras

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Nível crítico de dano de papuã em feijão-comum

Cited by 17 publications

References 19 publications

Fluazifop-P-Butyl Efficacy as a Function of Application Time and Herbicide Dose

Fluazifop-P-Butyl Efficacy as a Function of Application Time and Herbicide Dose

Interference and Economic Threshold Level for Control of Beggartick on Bean Cultivars

A Multy-Year Study Reveals the Importance of Residual Herbicides on Weed Control in Glyphosate-Resistant Soybean

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