Potential impact of host pest fed on Bt-modified corn on the development of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae)

Egyptian Journal of Biological Pest Control

Saad Moussa¹  Fatina Baiomy¹  Essam M. Moussa¹  Karim Abouzaid¹  Mona Nasr¹  Essam A. Kamel² 

[1] Insect Biotechnology and Molecular Biology Unit, Plant Protection Research Institute (PPRI), Agricultural Research Center, Giza, Egypt;Toxicology Unit, Animal Health Research Institute, Dokki, Egypt

关键词: Bt toxins;    Bt- modified corn;    Chrysoperla carnea;    Bioassay experiments;    Sitotroga cerealella;    Development;    Cypermethrin;    Aphid;   

DOI  :  10.1186/s41938-017-0018-8

学科分类：动物科学

来源: Springer

【 摘 要 】

Laboratory experiments were conducted to study the potential impact of genetically modified corn hybrid, transgenic Bacillus thuringiensis (Bt)-expressing (Cry2Ab/1Ac), and the corresponding isogenic untransformed Bt-free hybrid on biological parameters of the green lacewing predator, Chrysoperla carnea (Stephens). The effectiveness of transgenic (Bt)-expressing (Cry2Ab/1Ac) on C. carnea developmental parameters (larval duration, pupal duration, mortality %, pupation %, adult emergence %, and adult duration time) was investigated in the first experiment. In the second experiment, the effect of Bt Cry2Ab and Cry1Ac partially purified toxins on the hatchability of C. carnea eggs compared to cypermethrin was examined. Additionally, the toxicity effect of Angoumois grain moth, Sitotroga cerealella, eggs sprayed with BtCry2Ab/1Ac mixture and cypermethrin on C. carnea was tested. The results showed that the mortality percentage of C. carnea fed on aphids reared on Bt corn (40%) was less than that fed on aphids reared on non-Bt corn (50%). Moreover, the larval mortality %, net pupation, and adults’ emergence percentage of C. carnea larvae fed on aphids reared on Bt corn and non-Bt corn were not significantly different. On the other hand, the hatchability data showed that the chemical insecticide (cypermethrin) severely affected the C. carnea eggs compared to Cry2Ab/1Ac toxins. These findings proved that adopting biopesticide formulation based on Bt toxins or Bt-modified crops will not only affect C. carnea but also enhance its ability as a potential biological pest control agent.

【 授权许可】

CC BY