Effect of the Cry1, Cry2 and Vip3 protein combinations on the control ofAnticarsia gemmatalis(Erebidae) andChrysodeixis includens(Noctuidae) Lepidoptera

Author(s)

Figueiredo, Camila Soares ; Zara, Fernando Jose ; Desiderio, Janete Apparecida

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF PEST MANAGEMENT; v. 68, n. 2, p. 9-pg., 2020-09-17.

Abstract

The transgenic soybean expressing thecry1Acinsecticidal gene of theBacillus thuringiensisbacterium has been widely adopted in agriculture. This bacterium acts as an efficient control agent of pest insects due to the expression of different proteins with entomopathogenic activity such as Cry and Vip. This study investigates the toxicity and mode of interaction between the Cry1Ab, Cry1Ac, Cry2Aa, Cry2Ab and Vip3Aa proteins againstChrysodeixis includensandAnticarsia gemmatalislarvae. The combination of the Cry1Ac, Cry2Aa and Vip3Aa toxins had a synergistic effect forC. includens, however, only Vip3Aa and Cry2Aa exhibited synergistic interaction againstA. gemmatalis. Cry1Ab and Cry1Ac proteins have been shown to share receptors with the two species tested, however, Cry1Ac does not share binding sites with Cry2Aa, Cry2Ab, and Vip3Aa in both species. Besides helping the resistance management toB. thuringiensisproteins, the combination of Cry and Vip proteins can increase toxicity through synergistic action. (AU)

• FAPESP's process: 13/15128-2 - Mode of action of proteins Cry1, Cry2 and Vip3 Bacillus thuringiensis in Spodoptera frugiperda and Anticarsia gemmatalis
• Grantee: Camila Soares Figueiredo
• Support Opportunities: Scholarships in Brazil - Doctorate