Bt cotton producing Cry1Ac and Cry2Ab does not harm the parasitoid Aenasius arizonensis (Girault): a host-mediated tritrophic assay

Shera, P. S.; Karmakar, Prasun; Sharma, S. N.; Kaur, Rabinder; Sangha, K. S.

doi:10.1007/s12600-021-00908-w

Cited by 1 publication

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…42 Contrariwise, when parasitized on cotton mealybug Phenacoccus solenopsis (Tinsley) (a nontarget organism of Bt proteins) on Bt cotton (expressing Cry1Ac and Cry2Ab) or non-Bt cotton leaves, nonsignificant differences were observed for the developmental duration, longevity, parasitism rate of Aenasius arizonensis (Girault) between two treatments. 43 There was no negative effect on Cotesia plutellae (Kurdjumov) when parasitized on Bt-resistant Plutella xylostella (Linnaeus) compared with the control treatment. 44 When Cotesia marginiventris (Cresson) parasitized on Spodoptera frugiperda (Lepidoptera) feeding on cry1Ab-expressing maize, the developmental duration and fecundity were prolonged and reduced, respectively, compared with the control group.…”

Section: Discussionmentioning

confidence: 91%

“…Microplitis mediator (Haliday) parasitized on cotton bollworm Helicoverpa armigera (Hübner) fed with Cry1Ac diet had prolonged egg and larval period, reduced pupa and adult weight 42 . Contrariwise, when parasitized on cotton mealybug Phenacoccus solenopsis (Tinsley) (a nontarget organism of Bt proteins) on Bt cotton (expressing Cry1Ac and Cry2Ab) or non‐Bt cotton leaves, nonsignificant differences were observed for the developmental duration, longevity, parasitism rate of Aenasius arizonensis (Girault) between two treatments 43 . There was no negative effect on Cotesia plutellae (Kurdjumov) when parasitized on Bt‐resistant Plutella xylostella (Linnaeus) compared with the control treatment 44 .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring reduced accumulation and risk evaluation of Cry1Ca during food chain transfer from genetically engineered plant to endoparasitoid

Wen

Dong

et al. 2023

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND The potential risk of insecticidal proteins produced by genetically engineered (GE) plants to nontarget organisms have long been an ecotoxicological concern. Apanteles chilonis, an important endoparasitoid of rice pest Chilo suppressalis, potentially is exposed to Bacillus thuringiensis (Bt) endotoxins through a food chain of transgenic Bt rice – C. suppressalis – A. chilonis, and thus, a rigorous risk assessment is urgently needed. Here, we combined a tri‐trophic bioassay system with high‐dose exposure approach using C. suppressalis hemolymph as the carrier of insecticidal protein to evaluate the biosafety of Cry1Ca to A. chilonis. RESULTS Cry1Ca protein could be transmitted and retained along the food chain and remains bioactive in the hemolymph of C. suppressalis during the pre‐adult duration of A. chilonis. No significant differences in pre‐adult period, male and female longevity, adult fecundity and weight, emergence rate nor sex ratio were observed when A. chilonis parasitized C. suppressalis feeding on cry1Ca rice compared with control treatment. However, the pupal period and weight were significantly prolonged and decreased. When A. chilonis parasitized C. suppressalis injected with a high dosage of Cry1Ca protein, no adverse effects on the life‐history parameters, peroxidase (POD), superoxide dismutase (SOD) or glutathione reductase (GR) of A. chilonis were observed, demonstrating that the host quality mediates adverse effects during the food chain. CONCLUSIONS We confirmed that Cry1Ca posed no ecological risk to the nontarget endoparasitoid A. chilonis. This study may serve as an example for future risk assessment of transgenic crops to nontarget endoparasitoids. © 2023 Society of Chemical Industry.

show abstract

Section: Discussionmentioning

confidence: 91%