Abstract
An experiment was carried out at the field of Entomology, Bangladesh Agricultural University, Mymensingh to determine the extent of damage of bean plants by aphid, Aphis craccivora Koch. and its biorational management. Efficacy of biorationals viz. Neem oil (2ml/l), Mahogany oil (2ml/l), Karanja oil (2ml/l), Abamectin (1ml/l), Spinosad (1ml/l), Emamectin benzoate (1g/l) and Lufenuron(1ml/l) were evaluated against bean aphid, A. craccivora Koch. The experiment was laid out in randomized complete block design with three replications of each treatment. Three sprays of the treatments were made at 15 days interval. The highest mean percentage of infested twig (82.57), flower (71.38), and pod (79.51) were found in untreated plants at 100 days after seed sowing (DAS). But at 60 DAS the lowest average percent infestations were found 26.08, 34.28 and 33.33 in twig, flower and pod, respectively. The highest reduction of aphid on the twigs was found in Abamectin (70.14%) followed by Spinosad (64.14%) and Neem oil (59.16%). Similarly the highest reduction of aphid was in Abamectin (79.02%) followed by Spinosad (73.95%) and Neem oil (69.22%) on the flowers. In both cases the lowest reduction of aphid was noticed in Karanja (39.24% & 48.70%) followed by Mahogany oil (40.72% & 54.00%). Reduction of aphid population on pods was the highest in Abamectin (86.97%), followed by Spinosad (81.97%) and Neem oil (75.1%) after 1st spray. The lowest reduction of aphid was found in Karanja oil (53.16%) followed by Mahogany oil (61.17%). After 2nd and 3rd sprays similar trend in percent reduction of aphid population was observed. Results also revealed that among the selected insecticides, Abamectin, Spinosad and Neem oil provided better protection of plants against bean aphid. The maximum increase of yield over control was found in Abamectin (9.37t/ha) followed by Spinosad (8.36 t/ha) and Neem oil (7.36 t/ha) after all sprays respectively. [J Bangladesh Agril Univ 2020; 18(5.000): 795-804]
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Claims 20
Claim · model-written summary
Untreated plants had 82.57% infested twigs at 100 DAS.
Verbatim
t0“bean plants”
e0“The highest mean percentage of infested twig (82.57), flower (71.38), and pod (79.51) were found in untreated plants at 100 days after seed sowing (DAS)”
t1“bean aphid”
Claim · model-written summary
Untreated plants had 71.38% infested flowers at 100 DAS.
Verbatim
t0“bean plants”
e0“flower (71.38), and pod (79.51) were found in untreated plants at 100 days after seed sowing (DAS)”
t1“bean aphid”
Claim · model-written summary
Untreated plants had 79.51% infested pods at 100 DAS.
Verbatim
t0“bean plants”
e0“pod (79.51) were found in untreated plants at 100 days after seed sowing (DAS)”
t1“bean aphid”
Claim · model-written summary
At 60 DAS, twig infestation was 26.08%.
Verbatim
t0“bean plants”
e0“at 60 DAS the lowest average percent infestations were found 26.08, 34.28 and 33.33 in twig, flower and pod, respectively”
t1“bean aphid”
Claim · model-written summary
At 60 DAS, flower infestation was 34.28%.
Verbatim
t0“bean plants”
e0“at 60 DAS the lowest average percent infestations were found 26.08, 34.28 and 33.33 in twig, flower and pod, respectively”
t1“bean aphid”
Claim · model-written summary
At 60 DAS, pod infestation was 33.33%.
Verbatim
t0“bean plants”
e0“at 60 DAS the lowest average percent infestations were found 26.08, 34.28 and 33.33 in twig, flower and pod, respectively”
t1“bean aphid”
Claim · model-written summary
Abamectin reduced twig aphids by 70.14%.
- Taxon
- bean plantst0
- Treatment
- Abamectine0
- Interactor
- aphide0pest
- Outcome
- aphid on the twigse0
- Direction
- reductione0
- Value
- 70.14%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“highest reduction of aphid on the twigs was found in Abamectin (70.14%)”
Claim · model-written summary
Spinosad reduced twig aphids by 64.14%.
- Taxon
- bean plantst0
- Treatment
- Spinosade0
- Interactor
- aphidt1pest
- Outcome
- aphid on the twigse1
- Direction
- reductione1
- Value
- 64.14%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Spinosad (64.14%)”
t1“bean aphid”
e1“highest reduction of aphid on the twigs was found in Abamectin (70.14%)”
Claim · model-written summary
Neem oil reduced twig aphids by 59.16%.
- Taxon
- bean plantst0
- Treatment
- Neem oile0
- Interactor
- aphidt1pest
- Outcome
- aphid on the twigse1
- Direction
- reductione1
- Value
- 59.16%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Neem oil (59.16%)”
t1“bean aphid”
e1“highest reduction of aphid on the twigs was found in Abamectin (70.14%)”
Claim · model-written summary
Abamectin reduced flower aphids by 79.02%.
- Taxon
- bean plantst0
- Treatment
- Abamectine0
- Interactor
- aphide0pest
- Outcome
- aphide0
- Direction
- reductione0
- Value
- 79.02%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“highest reduction of aphid was in Abamectin (79.02%)”
Claim · model-written summary
Spinosad reduced flower aphids by 73.95%.
- Taxon
- bean plantst0
- Treatment
- Spinosade0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 73.95%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Spinosad (73.95%)”
t1“bean aphid”
e1“highest reduction of aphid was in Abamectin (79.02%)”
Claim · model-written summary
Neem oil reduced flower aphids by 69.22%.
- Taxon
- bean plantst0
- Treatment
- Neem oile0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 69.22%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Neem oil (69.22%)”
t1“bean aphid”
e1“highest reduction of aphid was in Abamectin (79.02%)”
Claim · model-written summary
Karanja reduced twig aphids by 39.24%.
- Taxon
- bean plantst0
- Treatment
- Karanjae0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 39.24%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Karanja (39.24% & 48.70%)”
t1“bean aphid”
e1“highest reduction of aphid on the twigs was found in Abamectin (70.14%)”
Claim · model-written summary
Karanja reduced flower aphids by 48.70%.
- Taxon
- bean plantst0
- Treatment
- Karanjae0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 48.70%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Karanja (39.24% & 48.70%)”
t1“bean aphid”
e1“highest reduction of aphid was in Abamectin (79.02%)”
Claim · model-written summary
Mahogany oil reduced twig aphids by 40.72%.
- Taxon
- bean plantst0
- Treatment
- Mahogany oile0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 40.72%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Mahogany oil (40.72% & 54.00%)”
t1“bean aphid”
e1“highest reduction of aphid on the twigs was found in Abamectin (70.14%)”
Claim · model-written summary
Mahogany oil reduced flower aphids by 54.00%.
- Taxon
- bean plantst0
- Treatment
- Mahogany oile0
- Interactor
- aphidt1pest
- Outcome
- aphide1
- Direction
- reductione1
- Value
- 54.00%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Mahogany oil (40.72% & 54.00%)”
t1“bean aphid”
e1“highest reduction of aphid was in Abamectin (79.02%)”
Claim · model-written summary
Abamectin reduced pod aphids by 86.97% after the first spray.
- Taxon
- bean plantst0
- Treatment
- Abamectine0
- Interactor
- aphide0pest
- Outcome
- aphid population on podse0
- Direction
- Reductione0
- Value
- 86.97%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Reduction of aphid population on pods was the highest in Abamectin (86.97%)”
Claim · model-written summary
Spinosad reduced pod aphids by 81.97% after the first spray.
- Taxon
- bean plantst0
- Treatment
- Spinosade0
- Interactor
- aphidt1pest
- Outcome
- aphid population on podse1
- Direction
- Reductione1
- Value
- 81.97%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Spinosad (81.97%)”
t1“bean aphid”
e1“Reduction of aphid population on pods was the highest in Abamectin (86.97%)”
Claim · model-written summary
Neem oil reduced pod aphids by 75.1% after the first spray.
- Taxon
- bean plantst0
- Treatment
- Neem oile0
- Interactor
- aphidt1pest
- Outcome
- aphid population on podse1
- Direction
- Reductione1
- Value
- 75.1%e0
Not reportedComparator
Verbatim
t0“bean plants”
e0“Neem oil (75.1%) after 1st spray”
t1“bean aphid”
e1“Reduction of aphid population on pods was the highest in Abamectin (86.97%)”
Claim · model-written summary
Abamectin produced the maximum yield increase over control, 9.37t/ha.
Verbatim
t0“bean plants”
e0“maximum increase of yield over control was found in Abamectin (9.37t/ha)”
t1“bean aphid”
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See all 30 papers →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.