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General Information

Document type
  • Peer-reviewed journal article
GE organism
  • cotton
GE trait
  • insect resistance
Country
  • India

Results

Efficacy
  • positive effect
Safety for environment
  • no effect

Impact of Bt-engineered cotton on target and non-target arthropods, toxin flow through different trophic levels and seedcotton yield Review Article

Dhillon, MK; Sharma, HC
Karnataka Journal of Agricultural Sciences. 2009 April. 22(3):462-466

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Abstract

Insect-resistant genetically engineered cottons expressing ?-endotoxins from the bacterium, Bacillus thuringiensis (Bt) have been adopted on a large scale worldwide. The effects of Bt cotton on non-target insect pests, generalist predators, arthropod diversity and toxin flow through different trophic levels under insecticide protected and unprotected conditions was studied. The populations of major non-target insect pests (leafhoppers, whiteflies, ash weevils, aphids, dusky and red cotton bug, and green bug) and the generalist predators (ladybirds, chrysopids, and spiders) did not differ significantly between the Bt and non-Bt cottons, while their numbers were lower in insecticide protected than under unprotected conditions, except for aphids and whiteflies. Although, Bt toxin was detected in some insect species, no significant differences were observed in their abundance on Bt and non-Bt cottons. Species richness and diversity of plant inhabiting and soil dwelling arthropods was similar in Bt-transgenic and non-transgenic cottons, except in a few cases. The Bt-transgenic cotton was effective for the management of bollworms, without any major adverse effects on the non-target arthropods.

Keywords

Bt-Cotton, non-target effects, arthropod biodiversity, toxin flow, seedcotton yield

Funding

Funding source
  • Indian Department of Science and Technology
Funding country
  • India
Funding type
  • government

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Cite this study

MLA

Dhillon, MK, HC Sharma. "Impact of Bt-engineered cotton on target and non-target arthropods, toxin flow through different trophic levels and seedcotton yield." Karnataka Journal of Agricultural Sciences 22.3 (2009): 462-466. Web. 18 Jul. 2018.

APA

Dhillon, MK., & Sharma, HC. (2009). Impact of Bt-engineered cotton on target and non-target arthropods, toxin flow through different trophic levels and seedcotton yield. Karnataka Journal of Agricultural Sciences, 22(3), 462-466.

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