Competição de trigo com azevém em função de épocas de aplicação e doses de nitrogênio

Paula, Juliana Maria de; Agostinetto, Dirceu; Schaedler, Carlos Eduardo; Várgas, Leandro; Silva, D.R.O

doi:10.1590/s0100-83582011000300009

Cited by 13 publications

(14 citation statements)

References 10 publications

(7 reference statements)

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“…L. multiflorum is well adapted to the southern region of Brazil, where it is used as a winter cover crop in the no‐till agriculture system, as well as a cover crop in orchards, or as forage . The presence of this weed can reduce wheat yield up to 62% . After the first GR case in Rio Grande do Sul, farmers began to use ACCase inhibitors to manage GR L. multiflorum prior to sowing soybean or ALS inhibitors in corn as alternative management tool .…”

Section: Herbicide Resistance In South Americamentioning

confidence: 99%

“…85 The presence of this weed can reduce wheat yield up to 62%. 86 After the first GR case in Rio Grande do Sul, farmers began to use ACCase inhibitors to manage GR L. multiflorum prior to sowing soybean or ALS inhibitors in corn as alternative management tool. 78,84,87 Consequently, in 2010/2011 L. multiflorum populations with multiple resistance to glyphosate and ACCase inhibitors were reported.…”

Section: Herbicide Resistance In South Americamentioning

confidence: 99%

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The challenge of herbicide resistance around the world: a current summary

Peterson¹,

Collavo

Ovejero

et al. 2018

Pest Management Science

245

192

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Herbicide-resistant weeds have been observed since the early years of synthetic herbicide development in the 1950s and 1960s. Since that time there has been a consistent increase in the number of cases of herbicide resistance and the impact of herbicide-resistant weeds. Although the nature of crop production varies widely around the world, herbicides have become a primary tool for weed control in most areas. Dependence on herbicides continues to increase as global populations migrate away from rural areas to cities and the agricultural labor force declines. This increased use of herbicides and the concurrent selection pressure have resulted in a rise in cases of multiple resistance, leaving some farmers with few or no herbicide options for certain weed infestations. Global population and economic forces drive many farmer choices regarding crop production and weed control. The challenge is how to insert best management practices into the decision-making process while addressing various economic and regulatory needs. This review endeavors to provide a current overview of herbicide resistance challenges in the major crop production areas of the world and discusses some research initiatives designed to address portions of the problem. © 2017 Society of Chemical Industry.

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Section: Herbicide Resistance In South Americamentioning

confidence: 99%

Section: Herbicide Resistance In South Americamentioning

confidence: 99%

The challenge of herbicide resistance around the world: a current summary

Peterson¹,

Collavo

Ovejero

et al. 2018

Pest Management Science

245

192

View full text Add to dashboard Cite

show abstract

“…This productivity results especially from the use of cultivars with high yield potential, the appropriate use of inputs and adoption of technology. However, productivity is below that achieved in the areas of research, and this is, in part, due to the unsatisfactory control of weeds, which cause damage to the quantitative and qualitative production of wheat (Paula et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Adaptive value of ryegrass biotypes with low-level resistance and susceptible to the herbicide fluazifop and competitive ability with the wheat culture

et al. 2013

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-Ryegrass is the main weed in wheat crop, causing yield loss due to competition by environmental resources. The objectives of this study were to estimate the fitness cost of ryegrass biotypes with low-level resistance and susceptible to fluazifop and to investigate the relative competitive ability of these biotypes between themselves and against the crop. Thus, fitness cost and competitive ability experiments were conducted under greenhouse conditions. For the fitness cost experiments, the low-level resistant ryegrass biotypes and those susceptible to fluazifop were used. For competitive ability, the treatments were arranged in a replacement series, with five proportions of the wheat cultivar FUNDACEP Horizonte and the low-level resistant and susceptible ryegrass biotypes 100:0, 75:25, 50:50, 25:75 and 0:100. Competitive analysis was carried out through diagrams applied to the replacement experiments and use of relative competitiveness indices. Variables evaluated were plant height, in the fitness cost experiment, and leaf area and shoot dry biomass in both experiments. The ryegrass biotypes show overall similar fitness cost and competitive ability. The wheat cultivar FUNDACEP Horizonte is superior in competitive ability to the ryegrass biotype with low-level resistance and equivalent to the susceptible biotype.Keywords: weed, competition, Lolium multiflorum. RESUMO -O azevém é a principal planta daninha da cultura do trigo, a qual contribui para a perda de produtividade devido à competição exercida por recursos do ambiente. Os objetivos deste trabalho foram estimar o valor adaptativo de biótipos de azevém com resistência de nível baixo e suscetível ao herbicida fluazifop e investigar a habilidade competitiva relativa desses biótipos

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“…This indicates that both the culture and the competitor tolerate more the intraspecies competition. On the other hand, the application of N in higher doses increases the LA and ADPM of the wheat culture competing with ryegrass, as observed by Paula et al (2011).…”

mentioning

confidence: 77%

Competition Between Wheat and Ryegrass Under Different Levels of Nitrogen Fertilization

et al. 2017

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-The main limiting factors for the productive potential of wheat crops are related to the competition with weeds for resources such as water, light and nutrients. Nitrogen (N) is an important nutrient used to maintain crop productivity, as well as promoting the competitive ability of crops and therefore suppress the weed growth. In this context, the goal of this study was to evaluate the effects of wheat plants in competition with ryegrass under different levels of nitrogen fertilization. Treatments were arranged in a factorial design, where factor A consisted in nitrogen rates (0, 60, 120, 180 and 240 kg ha -1 ) and factor B consisted in ryegrass and wheat plants ratios, which were: 100/0 (pure stand of 64 wheat plants), 50/50 (32 wheat plants and 32 ryegrass plants) and 0/100 (pure stand of 64 ryegrass plants). Competition between the culture and ryegrass by N resulted in mutual damages, but the culture was more competitive than weeds, regardless of the N dose. The use of doses up to 120 kg N ha -1 increased the evaluated variables for wheat and ryegrass. Interspecific competition and nitrogen in higher than 120 kg N ha -1 doses reduced the morphological variables mass of the aerial part dry matter and leaf area of wheat and ryegrass.Keywords: nitrogen, replacement series, Triticum aestivum, Lolium multiflorum. (0, 60, 120, 180 RESUMO -Os principais fatores limitantes do potencial produtivo da cultura do trigo estão relacionados à competição das plantas daninhas por recursos como água, luz e nutrientes. O nitrogênio (N) é importante nutriente utilizado para manter a produtividade das culturas, além de favorecer a habilidade competitiva da cultura e, com isso, suprimir o crescimento das plantas daninhas. Nesse contexto, o objetivo deste trabalho foi avaliar os efeitos da competição de plantas de trigo e azevém sob diferentes níveis de adubação nitrogenada. Os tratamentos foram arranjados em esquema fatorial, em que o fator A constituiu-se de doses de nitrogênio

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Competição de trigo com azevém em função de épocas de aplicação e doses de nitrogênio

Cited by 13 publications

References 10 publications

The challenge of herbicide resistance around the world: a current summary

The challenge of herbicide resistance around the world: a current summary

Adaptive value of ryegrass biotypes with low-level resistance and susceptible to the herbicide fluazifop and competitive ability with the wheat culture

Competition Between Wheat and Ryegrass Under Different Levels of Nitrogen Fertilization

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