Effect of Integrated Weed Management Practices on Weeds Infestation, Yield Components and Yield of Cowpea [Vigna unguiculata (L.) Walp.] in Eastern Wollo, Northern Ethiopia

Mekonnen, Getachew; Sharma, J. J.; Negatu, Lisanework; Tana, Tamado

doi:10.9734/ajea/2015/14513

Cited by 8 publications

(5 citation statements)

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“…e effect was in line with the verdict of Mekonnen et al [23] who identified that, at 55 days after emergence, weeds accumulated appreciably the lowest dry weight in plots treated with 1 kg ha −1 of metolachlor and pendimethalin with one hand weeding supplementation which may possibly be due to the integrated effect of herbicides and hand weeding practices in cowpea.…”

Section: Weed Dry Weightsupporting

confidence: 85%

Wheat (Triticum aestivum L.) Yield and Yield Components as Influenced by Herbicide Application in Kaffa Zone, Southwestern Ethiopia

Mekonnen

2022

International Journal of Agronomy

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In order to identify the effect of herbicidal weed control practices on yield components and yield of wheat, the study was conducted at Kocha kebele in Chena district of Kaffa zone, Southwestern Ethiopia. 2,4-D amine salt (0.5 kg ha−1, 1 kg ha−1, and 1.5 kg ha−1) supplemented with one hand weeding 30 days after chemical application, clodinafop-propargyl 6% + fluroxypyr 12% (0.5 kg ha−1, 0.75 kg ha−1, and 1 kg ha−1) supplemented with one hand weeding 30 days after chemical application, pyroxsulam (0.4 kg ha−1, 0.5 kg ha−1, and 0.6 kg ha−1) supplemented with one hand weeding 30 days after chemical application, 2,4-D amine salt at 1 kg ha−1, clodinafop-propargyl 6% + fluroxypyr 12% at 0.75 kg ha−1, pyroxsulam at 0.5 kg ha−1, two hand weeding 30 and 45 days after crop emergence, weed-free check, and weedy check (unweeded) were the weed control treatments. Fifteen treatments were used for the trial and arranged in a randomized complete block design with three replications. The treatments had a significant effect on weed community, dry matter of weeds, parameters on weed control, phenology and growth parameters, and yield components and yield of wheat. The minimum total weed dry biomass was recorded in plots treated with clodinafop-propargyl 6% + fluroxypyr 12% at 1 kg ha−1 + one hand weeding at crop harvest. The highest weed control efficiency (93.30%) and herbicide efficiency index (27.06%) and the lowest weed index (14.18%) were recorded with the application of clodinafop-propargyl 6% + fluroxypyr 12% at 1 kg ha−1 + one hand weeding. Higher number of grains per spike (57.9), 1000-grain weight (39.4 g ha−1), grain yield (3635.6 kg ha−1), biological yield (9004 kgha−1), and harvest index (40.23%) were recorded with the application of clodinafop-propargyl 6% + fluroxypyr 12% at 1 kg ha−1 + one hand weeding 30 days after chemical application, next to weed-free check. Managing weeds with the application of clodinafop-propargyl 6% + fluroxypyr 12% at 1 kg ha−1 + one hand weeding contributed maximum (50,745.2 ETB) net benefit. The application of clodinafop-propargyl 6% + fluroxypyr 12% at1.0 kg ha−1 plus one hand weeding can be recommended to acquire high grain yield of wheat and high economic return in the study site.

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Section: Weed Dry Weightsupporting

confidence: 85%

Wheat (Triticum aestivum L.) Yield and Yield Components as Influenced by Herbicide Application in Kaffa Zone, Southwestern Ethiopia

Mekonnen

2022

International Journal of Agronomy

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“…Silva et al (2014) relataram que o S-metolachlor (1125 g de i.a ha -1 ) foi eficaz no controle de Amaranthus spinosus, Commelina benghalensis, Digitaria bicornis e Trianthema portulacastrum até 28 dias após a semeadura da cultivar Guariba, o que resultou em produtividade significativamente semelhante à obtida com capinas. Mekonnen et al (2015) conseguiram controle excelente de plantas daninhas com aplicação de S-metolachlor (1000 g de i.a ha -1 ) e capina aos 35 dias após a emergência na cultivar Asrat, resultando em maior produtividade. Associado à ação do S-metolachlor durante a fase inicial do crescimento da cultura, o desenvolvimento do dossel de feijão-caupi resultou em sombreamento da superfície do solo e de plantas daninhas e pode ter contribuído para a obtenção de eficácia de controle de plantas daninhas significativamente semelhante à da testemunha capinada.…”

Section: Daa -Dias Após a Aplicaçãounclassified

“…ha -1 ) was effective in controlling Amaranthus spinosus, Commelina benghalensis, Digitaria bicornis and Trianthema portulacastrum portulacastrum up to 28 days after sowing, and that productivity was not significantly different from that on fully weeded sites. Mekonnen et al (2015) reported high levels of weed control with S-metolachlor spraying (1000 g of i.a. ha -1 ), where a regime of weeding at 35 days after emergence with the Asrat variety resulted in increased productivity.…”

Section: Daa -Dias Após a Aplicaçãomentioning

confidence: 99%

Herbicide selectivity and weed control in cowpea

Fontes

Oliveira

Morais

2019

AGRO@MBIENTE ON-LINE

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Weeds negatively affect cowpea plants, causing reduced growth, delayed development and yield loss. The aim of this study was to assay selectivity and effectiveness of weed control herbicides in cowpea cropping field conditions. For selectivity evaluation, the herbicide S-metolachlor, was used pre-emergence (PRE), and carfentrazone-ethyl, clethodim, fenoxaprop-p-ethyl, fluazifop-p-butyl and quizalofop-p-ethyl post-emergence (POST). In effectiveness evaluation, S-metolachlor (PRE), and carfentrazone-ethyl (POST), S-metolachlor in PRE and fluazifop-p-butyl (POST), clethodim, carfentrazone-ethyl and clethodim, fenoxapropp- ethyl, carfentrazone-ethyl and fenoxaprop-p-ethyl, fluazifop-p-butyl, carfentrazone-ethyl and fluazifop-pbutyl, quizalofop-p-ethyl and carfentrazone-ethyl and quizalofop-p-ethyl (POST). Two controls were included, one with weeding at 15 and 35 days after sowing (DAS) and the other without weed control. Carfentrazone-ethyl caused mild phytotoxicity in plants seven days after application, but did not reduce yield (2337 kg ha-1). The levels of weed control and productivity obtained with S-metolachlor alone or in association with carfentrazoneethyl or fluazifop-p-butyl, associated or not with carfentrazone-ethyl, were similar to those obtained with weeds. Spraying with carfentrazone-ethyl alone resulted in low control effectiveness and reduced yield (1511 kg ha-1). Weed interference during the crop cycle reduced yield by 77% (531 kg ha-1). The selectivity and effectiveness obtained with the herbicides should be considered as an agronomic and economically-viable.

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“…The nature of weed interference strongly determines the choice of weed management practices (Adigun, 2002). Different methods of weed control in cowpea have shown to minimize weed competition in cowpea (Osipitan et al, 2013;Getachew et al, 2015;Prabhu et al, 2015;Singh et al, 2016).…”

Section: Weed Control In Cowpeamentioning

confidence: 99%

Weed Interference and Control in Cowpea Production: A Review

Osipitan¹

2017

JAS

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In spite of the great economic potential of cowpea as both domestic and commercial crop, a number of constraints, which include insect pests, diseases and weeds, limits its production in West and many parts of Africa. Weeds reduced cowpea yield and value by competing for light, water and nutrients. Cowpea suffers from weeds particularly when the crop is in the early growth stages before ground cover. Yield losses cause by weeds alone in cowpea production can be as high as 76% depending on the cowpea cultivar, environment and weed management practices. A timely weed removal at the critical period, which falls within the first 40 days of cowpea growth, would help to prevent an unacceptable yield. Weed management in cowpea has been with low technology. Hand weeding is the most widely used weed control method in cowpea but they are usually expensive and labour intensive. Cultural practices such as narrow row spacing and planting of early maturing varieties are also used for weed control in cowpea. Herbicides, which are relatively easy to use and less expensive, have not been widely adopted for weed control in cowpea. There are limited number of selective herbicides with wide spectrum for weed control in cowpea. However, an integrated practices that involved pre-emergence weed control using herbicides or physical weeding, and a supplementary weed removal that would ensure weed control up to 40 days after cowpea emergence could substantially prevent yield losses associated with weed interference.

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Effect of Integrated Weed Management Practices on Weeds Infestation, Yield Components and Yield of Cowpea [Vigna unguiculata (L.) Walp.] in Eastern Wollo, Northern Ethiopia

Cited by 8 publications

References 0 publications

Wheat (Triticum aestivum L.) Yield and Yield Components as Influenced by Herbicide Application in Kaffa Zone, Southwestern Ethiopia

Wheat (Triticum aestivum L.) Yield and Yield Components as Influenced by Herbicide Application in Kaffa Zone, Southwestern Ethiopia

Herbicide selectivity and weed control in cowpea

Weed Interference and Control in Cowpea Production: A Review

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