Tritrophic Effects of Different Bt Insecticidal Proteins on Chrysopa pallens

doi:10.16409/j.cnki.2095-039x.2019.04.003

Abstract

Abstract: In order to clarify the ecological safety of Bt proteins to Chrysopa pallens through tritrophic food chain, we investigated the effects of Cry1Ac, Cry1F and Cry2Ab insecticidal proteins that are widely transformed into several plant species on C. pallens using resistant target insects or insensitive non-target insects as preys. The results indicated that the three Bt proteins showed no significant adverse effects on the larvae (weight of the fourth instars and the larval duration), pupae (pupation rate, pupal weight and duration) and adults (eclosion rate, female and male weight and fecundity) of C. pallens through tritrophic food chain when using resistant Helicoverpa armigera (resistant to Cry1Ac or Cry2Ab) or resistant Ostrinia furnacalis (resistant to Cry1F) as the prey. Similarly, the three Bt proteins also had no obvious detrimental effects on the development and reproduction of C. pallens through tritrophic food chain when Bt-insensitive non-target insects Aploygus lucorum were used as the prey. Therefore, Cry1Ac, Cry1F and Cry2Ab protein, which have been widely transformed into current Bt cotton, Bt maize or Bt rice, showed no potential toxicity on the development and reproduction of C. pallens through tritrophic food chain.

Key words: Bt insecticidal protein, food chain, Chrysopa pallens, transgenic insect-resistant plants

CLC Number:

S476.2

ZHAO Man, TANG Jinrong, NIU Linlin, CHEN Lin, LIANG Gemei. Tritrophic Effects of Different Bt Insecticidal Proteins on Chrysopa pallens[J]. Chinese Journal Of Biological Control, 2019, 35(4): 557-562.

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