Compatibility of Bt biopesticides and adjuvants for Spodoptera frugiperda control.

Autor: Dos Santos CAM; PhD in Agricultural Entomology, Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil. anttony.ms@gmail.com., do Nascimento J; PhD Student in Agricultural Entomology, Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil., Gonçalves KC; PhD Student in Agricultural Entomology, Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil., Smaniotto G; PhD Student in Agricultural Entomology, Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil., de Freitas Zechin L; Student in Agronomy, Department of Plant Production, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil., da Costa Ferreira M; Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil. mc.ferreira@unesp.br., Polanczyk RA; Department of Plant Health, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal, 14884-900, Brazil.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Mar 05; Vol. 11 (1), pp. 5271. Date of Electronic Publication: 2021 Mar 05.
DOI: 10.1038/s41598-021-84871-w
Abstrakt: Spodoptera frugiperda is a pest of economic importance for several crops with resistance reports to Bt crops and pesticides. Eco-friendly Bt biopesticides may be an alternative to chemical insecticides due to their selectivity and specificity. However, the efficacy of Bt biopesticides may be influenced by the association with other chemicals, such as adjuvants. This study evaluated the compatibility and toxicity of Bt biopesticides mixed with adjuvants for the control of S. frugiperda. The treatments included the association of Dipel SC and Dipel PM with adjuvants. Compatibility tests were used to evaluate the Bt mixture. Bt suspensions obtained from mixtures of Bt and adjuvants at 10 6 and 3 × 10 8 spores/mL -1 were used to evaluate S. frugiperda mortality and distilled water was used as the control. The addition of the adjuvant LI increased growth and sporulation, indicating compatibility with Bt biopesticides. The other adjuvants were toxic to reducing Bt growth and sporulation. Only the mixture of Bt with LI and Bt alone was effective to S. frugiperda. The addition of adjuvants to Bt biopesticide affect the Bt sporulation, growth and mortality.
Databáze: MEDLINE
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