Timing of weed management and yield penalty due to delayed weed management in soybean

Daramola, Olumide Samuel

doi:10.1590/s0100-83582020380100072

Cited by 4 publications

(2 citation statements)

References 14 publications

(16 reference statements)

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“…The control of these plants is of paramount importance so that it is possible to obtain greater yield in any agricultural sector (5). Weeds can cause serious damage during crop development, in addition to causing an increase in the cost of control and/or yield losses (6,7) due to allelopathy, competition for water, light, nutrients and other interferences (5) making crop management difficult.…”

Section: Introductionmentioning

confidence: 99%

Soybean growth and production under straw of maize, Urochloa brizantha, Conyza spp. and Digitaria insularis

Albrecht

et al. 2022

Plant Sci. Today

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Weeds can cause serious damage during soybean development, due to allelopathy, competition for water, light and nutrients. It is necessary to investigate the influence of straw, of weeds Conyza spp. and Digitaria insularis, in soybean growth, production and composition and grains. If there is influence of allelopathic compounds at the crop. The aim of this study was to evaluate the influence of straw of maize and Urochloa brizantha (A.Rich.) R.D.Webster crops and Conyza spp., D. insularis, on growth, production and composition of grains produced by soybean. Treatments consisted of the control (absence of straw), maize straw, Urochloa brizantha straw, Conyza spp. straw (500, 1000, 1500 or 2000 kg ha-1) and D. insularis straw (500, 1000, 1500 or 2000 kg ha-1). The chlorophyll index, height of plants and insertion of the first pod, stem diameter at the collar and at 5 cm from the collar, root dry mass, number of pods and grains, weight of total grains, weight of 100 grains, protein and nitrogen (N), catalase and peroxidase contents in grains were evaluated. There was no difference between treatments for plant height, first pod height and chlorophyll index, as well as for total pods and 100 grain weight and protein content, N content and peroxidase and carboxylase enzymatic activity of the grains produced. For stem diameter, a higher value was found for the treatment with maize straw compared to the control (no straw). For dry root matter, treatments without straw and with Conyza spp. straw up to 1500 kg ha-1, differed from the treatment with maize straw. Even in some respects they provided beneficial effects compared to the absence of straw, which indicates the importance of crop residues. No allelopathic effects of weeds were observed on the growth and development of soybean. Conyza spp., D. insularis, maize or U. brizantha straws do not negatively affect soybean growth, production and grain composition.

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Section: Introductionmentioning

confidence: 99%

Soybean growth and production under straw of maize, Urochloa brizantha, Conyza spp. and Digitaria insularis

Albrecht

et al. 2022

Plant Sci. Today

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“…Consequently, the crops are subjected to heavy weed infestation, or the weeds are removed well after the crops have suffered irrevocable yield losses (Waddington et al, 2010;Adigun et al, 2017). Although the use of herbicides is efficient, they do not provide season-long weed control when used alone, and a single herbicide application may not control the entire weed spectrum with diverse physiology, morphology, and time of emergence (Labrada, 2003;Khaliq et al, 2014;Daramola, 2020). In addition, smallholder farmers lack the technical know-how for correct herbicide application.…”

Section: Introductionmentioning

confidence: 99%

The effect of weed control timing on the growth and yield of upland rice (Oryza sativa L.)

et al. 2021

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Weed interference is a major threat to rice production, leading to high yield reduction and reduced profitability. Therefore, field experiments were conducted to evaluate the effect of the different timings of weed control on the growth and yield of upland rice in the 2015 and 2016 cropping seasons. The treatments consisted of periods when the crop was allowed to be weed-infested for the first 3, 6 and 9 weeks after sowing (WAS) and periods when the weeds were controlled for the first 3, 6 and 9 WAS. Two treatments of weed infestation and weed control until harvest were also included as the checks in a randomized complete block design with three replications. In both years, rice grain yields ranged from 0.6 to 0.8 t ha-1 in plots kept weed-infested until harvest, and from 3.5 to 3.9 t ha-1 in plots kept weed-free until harvest, indicating a 79-83% yield loss with uncontrolled weed growth. Weed infestation for the first 3 WAS did not cause a significant reduction in the growth and yield of rice provided the weeds were removed thereafter. However, the delay in weed control until 9 WAS reduced rice growth and resulted in irrevocable yield reduction. It was only necessary to remove the weeds between 3 and 9 WAS for optimum grain yield, as no significant yield increase was observed in weed control after 9 WAS in both years. This study showed that weed control between 3 and 9 WAS would give the optimum growth and yield of upland rice.

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The critical periods of weed control on the weed species composition, morphological, physiological, and biochemical characteristics responses of black seed (Nigella sativa L.)

Pesarakloo

Alamdari

Avarseji

et al. 2023

Biochemical Systematics and Ecology

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Timing of weed management and yield penalty due to delayed weed management in soybean

Abstract: HIGHLIGHTS  Weed infestation for the first 14 days had no effect on soybean yield if the weeds were removed thereafter.  Weeds, when not controlled throughout the season, resulted in 53-56% yield loss.  Critical weed-free period was between 14 and 42 days after sowing.

Cited by 4 publications

References 14 publications

Soybean growth and production under straw of maize, Urochloa brizantha, Conyza spp. and Digitaria insularis

Soybean growth and production under straw of maize, Urochloa brizantha, Conyza spp. and Digitaria insularis

The effect of weed control timing on the growth and yield of upland rice (Oryza sativa L.)

The critical periods of weed control on the weed species composition, morphological, physiological, and biochemical characteristics responses of black seed (Nigella sativa L.)

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