Determination of the Optimum Weeding Regime on Seed Yield of Two Selected Kenaf Varieties in South-West Nigeria

Ajibola, A. T.; Modupeola, T.O.

doi:10.3923/rjss.2014.125.131

Cited by 2 publications

(6 citation statements)

References 2 publications

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“…The cumulative effect of the prolonged weed interaction with kenaf plants negatively impacted on agronomic traits and yield. This corroborates previous studies that weeds reduced kenaf components yield by 50 -80% [4,5] and [13].…”

Section: Gross Fibre Yield As Influenced By Herbicide Applicationsupporting

confidence: 93%

“…However, weed interaction with kenaf in weedy plots consequently reduced kenaf plant growth due to critical weed interference. This confirmed the previous reports that weedy kenaf plot reduced agronomic traits and caused yield penalties in both fibre and seed production [3,4,5].…”

Section: Effects Of Herbicides On Kenaf Agronomic Traitssupporting

confidence: 92%

“…However, weed control remain an uphill task for kenaf farmers, especially the resource-poor ones. Delayed weeding and weedy kenaf fields may significantly reduce both fibre and seed yield by about 50 -80% [4,5] and net return (NR) reduced by 86% [3].…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of Candidate Herbicides for Post- Emergence Weed Control in Kenaf (Hibiscus cannabinus L.)

Aluko

2019

JAERI

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Post emergence application of herbicides reduced weed growth, enhanced kenaf agronomic traits and fibre yield. A study was conducted to determine the efficacy of some herbicide formulations for post emergence weed control in kenaf at Ibadan (0.7.38N; 003.84E- Derived savanna agro-ecology) station of the Institute of Agricultural Research and Training (IAR&T), Obafemi Awolowo University, Ibadan in 2016 and 2017 rainy seasons. Herbicides applied were Quazilofop-P-ethyl (100, 150, 200 ml/ha), Oxyfluorfen (0.96, 1.20 and 1.44 kg ai/ha) and Fluazifop-p-butyl 150, 225 and 300 g ai/ha) at three rates each, while weed-free and weedy were the control treatments. Weed flora composition before land preparation was dominated by annual weeds; broadleaves (70%), grass (20%) and spiderwort (10%). At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge. Weed flora dynamics after treatments application might have been influenced by herbicide formulations applied. Oldenlandia corymbusa, Cyperus escunlentus, Desmodium scorpurus and Cyperus rotundus were identified as prevalent weeds across the treatments applied while Mimosa pudica, was a minor weed. Herbicides improved kenaf agronomic traits (plant height, stem-butt girth and number of leaves/plant) due to minimal weed competition; reduced weed flora composition and weed weight relative to weed infested kenaf plants in weedy control. Oxyfluorfen (0.96, 1.20 and 1.44 kg ai/ha); fluazilof-p-butyl (225 and 300 g ai/ha); Quazilofop-P-ethyl (100 and 200 ml/ha) reduced weed dry weight by 60-70%. Weed-free plots had the highest weed control efficiency (WCE %). Evidently, acceptable WCE of ≥ 80% and comparable gross fibre yield with the maximum in weed-free recorded in Oxyfluorfen (1.20 and 1.44 kg ai/ha) and Fluazilofop-p-butyl (300 g ai/ha) showed their efficacies. However, low WCE 50 -65% in Quazilofop-p-ethyl (100, 150, 200 ml/ha) might reflected a review of the doses applied for better efficacy. Kenaf gross fibre yield was reduced by 65% in the weedy check plot, due to superior weed infestation and utmost weed dry weight accumulation. Notwithstanding, the benefit-cost ratio and environmental impact assessment of the study must be carried out for economically viable kenaf production and environmental friendliness.

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Section: Gross Fibre Yield As Influenced By Herbicide Applicationsupporting

confidence: 93%

Section: Effects Of Herbicides On Kenaf Agronomic Traitssupporting

confidence: 92%

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Efficacy of Candidate Herbicides for Post- Emergence Weed Control in Kenaf (Hibiscus cannabinus L.)

Aluko

2019

JAERI

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“…However, the selection of competitive cultivars is a useful weed management option (Table 6). In a study by Ajibola and Modupeola [120], total weed density was 17% lower in plots of the cultivar "Tangum 1" as compared to the values recorded in plots of the cultivar "Cuba 108a". Aluko and Anjorin [121] observed that the presence of "Ifeken 100" cultivar reduced weed biomass by 53% compared to that of "V1 400-2", indicating that tall genotypes are very competitive against weeds.…”

Section: Kenaf (Hibiscus Cannabinus L)mentioning

confidence: 83%

“…In a study by Kuchinda et al [21], kenaf exploited the nitrogen inputs (90 kg N ha -1 ) added at crop thinning more effectively than Euphorbia heterophylla L., Crotolaria retusa L., and Ageratum ciliare L. Less. [120].…”

Section: Kenaf (Hibiscus Cannabinus L)mentioning

confidence: 99%

Weed Management Practices to Improve Establishment of Selected Lignocellulosic Crops

et al. 2021

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Lignocellulosic biomass is one of the dominant renewable energy resources suited for the production of sustainable biofuels and other energy purposes. This study was focused on weed management strategies that can improve the establishment of six lignocellulosic crops. The studied crops included: giant miscanthus, switchgrass, giant reed, cardoon, sweet sorghum, and kenaf. Delayed planting, increased planting densities, and mulching techniques can suppress weeds in giant miscanthus. Weed competition is detrimental for switchgrass establishment. Seedbed preparation and cultivar selection can determine its ability to compete with weeds. Giant reed is unlikely to get outcompeted by weeds, and any weed control operation is required only for the first growing season. Competitive cultivars and increased seeding rates maximize the competitiveness of cardoon against weeds. Several cultural practices can be used for non-chemical weed management in sweet sorghum and kenaf. For all crops, pre-emergence herbicides can be applied. The available safe post-emergence herbicides are limited. Mechanical weed control during crucial growth stages can provide solutions for sweet sorghum, kenaf, and perennial grasses. Further research is required to develop effective weed management strategies, with emphasis on cultural practices, that can improve the establishment of these prominent lignocellulosic crops.

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Determination of the Optimum Weeding Regime on Seed Yield of Two Selected Kenaf Varieties in South-West Nigeria

Cited by 2 publications

References 2 publications

Efficacy of Candidate Herbicides for Post- Emergence Weed Control in Kenaf (Hibiscus cannabinus L.)

Efficacy of Candidate Herbicides for Post- Emergence Weed Control in Kenaf (Hibiscus cannabinus L.)

Weed Management Practices to Improve Establishment of Selected Lignocellulosic Crops

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