Abstract

AbstractThe oriental armyworm, Mythimna separata Walker (Lepidoptera: Noctuidae), is a severe pest of graminaceous crops in Asia and Australia. In this study, we investigated the impacts of Cry2Ab, cantharidin and its analogues (cantharidin‐23 and cantharidin‐24) on M. separata growth, hydrolytic enzymes and detoxifying enzymes. Differences in weight gain and enzyme activities among all treatments were observed. Larval and pupal weight gain and hydrolytic enzyme activities declined when larvae were treated with Cry2Ab, cantharidin and its analogues, individually or in combination. The combination of Cry2Ab and cantharidin or cantharidin‐24 had a markedly adverse effect on larval weight gain. Alkaline phosphatase and acid phosphatase were inhibited, whereas glutathione S‐transferase was upregulated in all treatments with sublethal doses. The maximum reduction in alkaline phosphatase activity and increase in glutathione S‐transferase activity occurred after the larvae were treated with a combination of Cry2Ab and cantharidin‐24 over 48 h. The results suggest that the compositions of Cry2Ab, cantharidin and cantharidin‐24 have a potential use in pest management.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.