Abstract
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.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Before land preparation, broadleaf weeds comprised 70% of flora.
- Taxon
- Kenaf
Hibiscus cannabinust0 - Outcome
- broadleavese0
- Value
- 70%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadleaves (70%), grass (20%) and spiderwort (10%)”
t0“Kenaf”
Claim · model-written summary
Before land preparation, grasses comprised 20% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- grasse0
- Value
- 20%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadleaves (70%), grass (20%) and spiderwort (10%)”
t0“Kenaf”
Claim · model-written summary
Before land preparation, spiderwort comprised 10% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- spiderworte0
- Value
- 10%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadleaves (70%), grass (20%) and spiderwort (10%)”
t0“Kenaf”
Claim · model-written summary
At 10 weeks, broadleaf weeds comprised 64% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- broadleafe0
- Value
- 64%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge”
t0“Kenaf”
Claim · model-written summary
At 10 weeks, grasses comprised 14% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- grasse0
- Value
- 14%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge”
t0“Kenaf”
Claim · model-written summary
At 10 weeks, spiderwort comprised 8% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- spiderworte0
- Value
- 8%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge”
t0“Kenaf”
Claim · model-written summary
At 10 weeks, sedges comprised 14% of flora.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- sedgee0
- Value
- 14%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge”
t0“Kenaf”
Claim · model-written summary
Oldenlandia, Cyperus and Desmodium species were prevalent weeds; Mimosa pudica was minor.
- Taxon
- KenafHibiscus cannabinust0
- Interactor
- Oldenlandia corymbusae0weed
- Outcome
- prevalent weedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Kenaf”
Claim · model-written summary
Herbicides improved kenaf height, stem girth, and leaf number.
- Taxon
- kenafHibiscus cannabinuse0
- Treatment
- Herbicidese0
- Outcome
- plant height, stem-butt girth and number of leaves/plante0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicides improved kenaf agronomic traits (plant height, stem-butt girth and number of leaves/plant) due to minimal weed competition”
Claim · model-written summary
Herbicides reduced weed flora composition and weight versus weedy control.
- Taxon
- kenafHibiscus cannabinuse0
- Treatment
- Herbicidest0
- Outcome
- weed flora composition and weed weighte0
- Direction
- reducede0
- Comparator
- weedy controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced weed flora composition and weed weight relative to weed infested kenaf plants in weedy control”
t0“Herbicides”
Claim · model-written summary
Oxyfluorfen at tested rates reduced weed dry weight by 60–70%.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Oxyfluorfen (0.96, 1.20 and 1.44 kg ai/ha)e0
- Outcome
- weed dry weighte0
- Direction
- reducede0
- Value
- 60-70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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%”
t0“Kenaf”
Claim · model-written summary
Fluazilof-p-butyl at 225 and 300 g ai/ha reduced weed dry weight by 60–70%.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- fluazilof-p-butyl (225 and 300 g ai/ha)e0
- Outcome
- weed dry weighte0
- Direction
- reducede0
- Value
- 60-70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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%”
t0“Kenaf”
Claim · model-written summary
Quazilofop-P-ethyl at 100 and 200 ml/ha reduced weed dry weight by 60–70%.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Quazilofop-P-ethyl (100 and 200 ml/ha)e0
- Outcome
- weed dry weighte0
- Direction
- reducede0
- Value
- 60-70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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%”
t0“Kenaf”
Claim · model-written summary
Weed-free plots had the highest weed control efficiency.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Weed-free plotse0
- Outcome
- weed control efficiencye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed-free plots had the highest weed control efficiency (WCE %)”
t0“Kenaf”
Claim · model-written summary
Oxyfluorfen at 1.20 and 1.44 kg ai/ha achieved at least 80% weed control efficiency and fibre yield comparable with weed-free plots.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Oxyfluorfen (1.20 and 1.44 kg ai/ha)e0
- Outcome
- WCEe0
- Direction
- comparablee0
- Value
- ≥ 80%e0
- Comparator
- weed-freee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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)”
t0“Kenaf”
Claim · model-written summary
Fluazilofop-p-butyl at 300 g ai/ha achieved at least 80% weed control efficiency and fibre yield comparable with weed-free plots.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Fluazilofop-p-butyl (300 g ai/ha)e0
- Outcome
- WCEe0
- Direction
- comparablee0
- Value
- ≥ 80%e0
- Comparator
- weed-freee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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)”
t0“Kenaf”
Claim · model-written summary
Quazilofop-p-ethyl at tested rates gave 50–65% weed control efficiency.
- Taxon
- KenafHibiscus cannabinust0
- Treatment
- Quazilofop-p-ethyl (100, 150, 200 ml/ha)e0
- Outcome
- WCEe0
- Direction
- lowe0
- Value
- 50 -65%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low WCE 50 -65% in Quazilofop-p-ethyl (100, 150, 200 ml/ha)”
t0“Kenaf”
Claim · model-written summary
Weedy check plots had 65% lower kenaf fibre yield.
- Taxon
- KenafHibiscus cannabinuse0
- Treatment
- weedy check plote0
- Outcome
- gross fibre yielde0
- Direction
- reducede0
- Value
- 65%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kenaf gross fibre yield was reduced by 65% in the weedy check plot”
Claim · model-written summary
The authors recommend reviewing Quazilofop-p-ethyl doses for efficacy.
- Taxon
- KenafHibiscus cannabinust0
- Outcome
- review of the doses applied for better efficacye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“might reflected a review of the doses applied for better efficacy”
t0“Kenaf”
The same questions in other papers
herbicide · weed · Hibiscus cannabinus (kenaf)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.