Abstract
Genetically engineered cottons expressing ä-endotoxins from Bacillus thuringiensis have been adopted on a large- scale worldwide. Therefore, we studied the efficacy of Bt cottons for the management of bollworms, their effects on non- target insects, and seedcotton yield under insecticide protected and unprotected conditions. Helicoverpa armigera and Earias vittella damage was significantly lower in Bt than in non-Bt cottons, while no significant differences were observed in egg-laying by H. armigera. The populations of major non-target sucking insect pests such as Amrasca biguttula biguttula, Bemisia tabaci, Aphis gossypii, Oxycarenus laetus, Dysdercus koenigii and Nezara viridula and the generalist predators, viz Cheilomenes sexmaculatus, Chrysopa spp., and spiders did not differ significantly between Bt and non-Bt cottons. Insecticide application resulted in resurgence of cotton aphid and whitefly, possibly because of elimination of natural enemies or better growth of plants uder protected conditions. Abundance of bollworms, non-target pests, and generalist predators was significantly greater before insecticide sprays than after insecticide application, except in a few cases. Bollworm damage was lower and seedcotton yields higher in Bt than in non-Bt cottons. The present studies indicated that Bt cotton hybrids are effective for the management of bollworms and yield more, and do not have any adverse effects on the abundance of generalist predators.
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Claims 9
Claim · model-written summary
Bt cotton had significantly less Helicoverpa armigera damage than non-Bt cotton.
- Taxon
- cottons
Gossypium hirsutume0 - Treatment
- Bte0
- Interactor
- Helicoverpa armigera
_gusano_cogollero.png?width=60)
Helicoverpa armigerae0pest - Outcome
- Helicoverpa armigera and Earias vittella damagee0
- Direction
- lowere0
- Comparator
- non-Bt cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_gusano_cogollero.png?width=500)
Verbatim
e0“Helicoverpa armigera and Earias vittella damage was significantly lower in Bt than in non-Bt cottons”
Claim · model-written summary
Bt cotton had significantly less Earias vittella damage than non-Bt cotton.
- Taxon
- cottonsGossypium hirsutume0
- Treatment
- Bte0
- Interactor
- Earias vittella
_Figure_26b.jpg?width=60)
Earias vittellae0pest - Outcome
- Earias vittella damagee0
- Direction
- lowere0
- Comparator
- non-Bt cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_26b.jpg?width=500)
Verbatim
e0“Helicoverpa armigera and Earias vittella damage was significantly lower in Bt than in non-Bt cottons”
Claim · model-written summary
H. armigera egg laying did not differ significantly between Bt and non-Bt cotton.
- Taxon
- cottonsGossypium hirsutumt0
- Treatment
- Btt0
- Interactor
- H. armigeraHelicoverpa armigerae0pest
- Outcome
- egg-laying by H. armigerae0
- Direction
- no significant differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences were observed in egg-laying by H. armigera”
t0“Bt transgenic cottons and insecticides on target and non-target insect pests, natural enemies and seedcotton yield in India”
Claim · model-written summary
Major non-target sucking pest populations did not differ significantly between Bt and non-Bt cotton.
- Taxon
- cottonsGossypium hirsutume0
- Treatment
- Bte0
- Outcome
- populations of major non-target sucking insect pestse0
- Direction
- did not differ significantlye0
- Qualifier
- Amrasca biguttula biguttula, Bemisia tabaci, Aphis gossypii, Oxycarenus laetus, Dysdercus koenigii and Nezara viridulae0
- Comparator
- non-Bt cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The populations of major non-target sucking insect pests such as Amrasca biguttula biguttula, Bemisia tabaci, Aphis gossypii, Oxycarenus laetus, Dysdercus koenigii and Nezara viridula and the generalist predators, viz Cheilomenes sexmaculatus, Chrysopa spp., and spiders did not differ significantly between Bt and non-Bt cottons”
Claim · model-written summary
Generalist predator populations did not differ significantly between Bt and non-Bt cotton.
- Taxon
- cottonsGossypium hirsutume0
- Treatment
- Bte0
- Outcome
- generalist predatorse0
- Direction
- did not differ significantlye0
- Qualifier
- Cheilomenes sexmaculatus, Chrysopa spp., and spiderse0
- Comparator
- non-Bt cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the generalist predators, viz Cheilomenes sexmaculatus, Chrysopa spp., and spiders did not differ significantly between Bt and non-Bt cottons”
Claim · model-written summary
Insecticide application caused cotton aphid resurgence.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Insecticide applicatione0
- Interactor
- cotton aphid
Aphis gossypiie0pest - Outcome
- cotton aphide0
- Direction
- resurgencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Insecticide application resulted in resurgence of cotton aphid and whitefly”
t0“cottons”
Claim · model-written summary
Insecticide application caused whitefly resurgence.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Insecticide applicatione0
- Interactor
- whiteflye0pest
- Outcome
- whiteflye0
- Direction
- resurgencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Insecticide application resulted in resurgence of cotton aphid and whitefly”
t0“cottons”
Claim · model-written summary
Bollworms, non-target pests and generalist predators were generally more abundant before than after insecticide spraying.
- Taxon
- cottonsGossypium hirsutumt0
- Treatment
- insecticide applicatione0
- Outcome
- Abundance of bollworms, non-target pests, and generalist predatorse0
- Direction
- greatere0
- Qualifier
- except in a few casese0
- Comparator
- before insecticide sprayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abundance of bollworms, non-target pests, and generalist predators was significantly greater before insecticide sprays than after insecticide application, except in a few cases”
t0“cottons”
Claim · model-written summary
Bt cotton produced higher seedcotton yield than non-Bt cotton.
- Taxon
- cottonsGossypium hirsutume0
- Treatment
- Bte0
- Outcome
- seedcotton yieldse0
- Direction
- highere0
- Comparator
- non-Bt cottonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bollworm damage was lower and seedcotton yields higher in Bt than in non-Bt cottons”
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See all 78 papers →transgenic · Earias vittella · Gossypium hirsutum (cotton)Results agree
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transgenic · ecology: diversity · Gossypium hirsutum (cotton)Results agree
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See all 7 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.