Weed Management in Soybean — Issues and Practices

Vivian, Rafael; Reis, André Rodrigues dos; Kálnay, Pablo A.; Várgas, Leandro; Ferreira, Ana Carolina Câmara; Mariani, Franciele

doi:10.5772/54595

Cited by 15 publications

(26 citation statements)

References 76 publications

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“…Therefore, the pre-emergent herbicides tested in this study represent options to be included in the integrated management of not only species within the Borreria genus, but also other weed species in glyphosate resistant soybean, which was estimated to be 90% of the planted Herbicide efficacy on Borreria densiflora control in pre-and ... soybean area in Brazil in the 2012/2013 season (Gomes & Borém, 2013). Moreover, several weed species, including those from the Borreria genus, possess ecological plasticity throughout Brazil and are on the list of species likely to develop resistance to herbicides used in cultivation, being the soybean crop genetically modified or not (Vivian et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions

Martins

Christoffoleti

2014

Planta daninha

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-The weed Borreria densiflora is a management issue in soybean and sugarcane crops from North and Northeastern Brazil. Knowledge upon chemical control of B. densiflora contributes to the integrated management of this weed species, especially when active ingredient options become reduced due to the selection of herbicide resistant or tolerant weed species. Experiments in pre-and post-emergence of B. densiflora were conducted in greenhouse, in a randomized block design and four replications. In pre-emergence, the doseresponse curve methodology was used and 7 herbicides were tested. In post-emergence, 9 herbicides at the recommended rate and 4 herbicide mixtures were tested. For pre and post-emergence conditions, evaluations were conducted at 60 and 21 days after treatment (DAT), respectively, and the variables analyzed were weed control and dry weight (%). The results showed options of pre-emergent herbicides that can be used for controlling B. densiflora, especially in sugarcane, where chemical weed control is mainly based on preemergent applications. In the current glyphosate resistance scenario, one should consider the use of pre-emergent herbicides within an integrated management of B. densiflora. For satisfactory post-emergence control, B. densiflora plants should be sprayed at the phenological stage of up to three pairs of leaves. Herbicide mixtures have been and will continue to be an important tool in chemical weed management, broadening the spectrum of weed control, while diversifying herbicide mechanisms of action, which helps to prevent or delay the appearance of herbicide resistance.Keywords: vassourinha-de-botão, chemical control, dose-response, herbicide mixtures, integrated weed management. Palavras-chave: vassourinha-de-botão, controle químico, dose-resposta, mistura de herbicidas, manejo integrado de plantas daninhas. RESUMO -A planta daninhaMARTINS, B

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Section: Resultsmentioning

confidence: 99%

Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions

Martins

Christoffoleti

2014

Planta daninha

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“…Soybean production presents a great potential to meet the food and protein need and improve the livelihood of millions of smallholder farmers in Nigeria and other parts of SSA. However, weeds are considered a major constraint to soybean production in Nigeria and other soybean producing countries (Sodangi et al, 2006;Vivian et al, 2013). A survey of crop pests in SSA has earlier revealed that weeds are the most deleterious pest in all zones studied (Oerke and Dehne, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Economic losses due to weed infestation in soybean vary with the cost of hoe-weeding, chemical or cultural methods of control that must be used (Sodangi et al, 2006). In the United States, for instance, weeds are reported to cause losses of several millions of US dollars yearly (Vivian et al, 2013), while soybean growers in the tropics lose about 1.8 million dollars annually due to weed infestation (Jannink et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Economics of row spacing and integrated weed management in soybean (Glycine max L.)

et al. 2019

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The high cost of cultivation and weed management are major limiting factors to increasing soybean productivity and net returns. Field experiments were conducted in 2016 and 2017 at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta to evaluate the economic performance of different row spacings and integrated weed management system in soybean. Three row spacings (50, 75 and 100 cm) as the main plots and six weed control methods and a weedy check as sub-plot treatments were accommodated in a split-plot arrangement of a randomized complete block design with three replications. There was a significant reduction in weed biomass with a reduction in row spacing from 100 cm to 75 cm and 50 cm. Furthermore, the cost of production, grain yield and gross profit increased with a reduction in row spacing from 100 to 75 and 50. When soybean was sown at 50-cm row spacing, the application of Probaben 400EC (metolachlor 20% w/v + prometryn 20% w/v) or Butachlor 60EC (butachlor) at 2.0 kg a.i/ha each followed by supplementary hoe-weeding at 6 weeks after sowing (WAS) resulted in the highest yield of 2301-2484 kg/ha and total revenue of 2129-1972 $/ha. Conversely, three hoe-weedings resulted in the highest yield of 2155-2081 kg/ha and total revenue of 1848-1783 $/ha for crops grown at 75-and 100-cm row spacings. Despite the higher yield and revenue obtained with three hoe-weedings for crops grown at 75-and 100-cm row spacings, the gross profit and benefit-cost ratios obtained were lower than those obtained with herbicide treatments applied alone or followed by supplementary hoeweeding. In terms of profitability, soybean planted at 50-cm row spacing and treated with Probaben 400EC at 2.0 kg a.i/ha followed by supplementary hoeweeding gave the highest gross profit of 1479 $/ha. Two or three hoe-weedings in soybean planted at narrow-row (50 cm) spacing did not guarantee the highest yield, but rather increased the cost of weed control. This study suggests that narrow-row spacing (50 cm) and pre-emergence herbicides will help to reduce the number of

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“…Weeds are considered one of the most damaging, if not the most damaging pests, in soybean [87]. About 37% of global production of soybean is affected by soybean, while 23% of global production is affected by other pests [88].…”

Section: Weedsmentioning

confidence: 99%

Soybean Production, Versatility, and Improvement

Shea¹,

Singer²,

Zhang³

2020

Legume Crops [Working Title]

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Soybean is one of the most widely planted and used legumes in the world due to its valuable seed composition. The many significant agronomic practices that are utilized in soybean production are highlighted with an emphasis on those used during the pregrowing season and growing season. The various pests of soybeans and the pest management strategies used to control them are described with special attention to insects, weeds, bacteria, fungi, and nematodes. The multitude of soybean uses for livestock and human consumption, and its industrial uses are discussed in this chapter. Additionally, the conventional breeding and genetic engineering attempts to improve soybean protein, oil, and sucrose content as well as eliminate the antinutritional factors, such as trypsin inhibitors, raffinose, stachyose, and phytate, are examined. In this chapter, the various management practices, uses, and breeding efforts of soybean will be discussed.

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Weed Management in Soybean — Issues and Practices

Cited by 15 publications

References 76 publications

Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions

Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions

Economics of row spacing and integrated weed management in soybean (Glycine max L.)

Soybean Production, Versatility, and Improvement

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