Data/hora: 11/06/2024 00:40:41

Provedor de dados: | 82
País: | Brazil
Título: | Compatibility of entomopathogenic fungi with neonicotinoid insecticides
Autores: | NEVES,PEDRO M.O.J.; HIROSE,EDSON; TCHUJO,PAULO T.; MOINO JR,ALCIDES.
Data: | 2001-06-01
Ano: | 2001
Palavras-chave: | Insecta; Beauveria bassiana; Metarhizium anisopliae; Paecilomyces sp.
Resumo: | The in vitro fungitoxic effect of the neonicotinoid insecticides acetamiprid (Saurus 200 SP), imidacloprid (Confidor 700 WDGr) and thiamethoxam (Actara 250 WG) in three concentrations (AR= average field recommendation; 0.7 AR and 1.3 AR) to the entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae and Paecilomyces sp. was studied. The effect of the insecticides on conidia germination, vegetative growth and conidiogenesis was compared. The insecticides had no effect on conidia germination, except under the highest concentration (1.3 AR) of acetamiprid, in which significant inhibition of M. anisopliae occurred. Vegetative growth of B. bassiana and M. anisopliae was significantly inhibited only by the three concentrations of acetamiprid treatment. Thiamethoxam treatment, in the AR and 1.3 AR concentrations, was significantly lower for B. bassiana vegetative growth. Paecilomyces sp. vegetative growth was higher than the control in the following treatments: 0.7 AR and AR of acetamiprid; all concentrations of imidacloprid; and in the two smallest concentrations, 0.7 AR and AR, of thiamethoxam. Conidia production was significantly smaller for Paecilomyces sp. and M. anisopliae, in the highest concentration (1.3 AR) of acetamiprid treatment and, for Paecilomyces sp., in the highest concentration (1.3 AR) of imidacloprid. Thiamethoxam significantly inhibited M. anisopliae conidia production, only in the smallest concentration (0.7 AR).Significant increase in the conidia production of Paecilomyces sp. fungus was observed in the following treatments: two concentrations, 0.7 AR and AR of acetamiprid; and in the two highest concentrations, AR and 1.3 AR, of thiamethoxam treatments. The use of insecticides, in the recommended formulations and other concentrations tested, in most cases, had no negative effect on conidia germination, conidia production and vegetative growth of B. bassiana, M. anisopliae and Paecilomyces sp. Consequently, these products, in the formulations and concentrations tested, may be used in IPM programs in which the entomopathogens are important pest regulators.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000200009
Editor: | Sociedade Entomológica do Brasil
Relação: | 10.1590/S1519-566X2001000200009
Formato: | text/html
Fonte: | Neotropical Entomology  v.30 n.2 2001
Fonte: | info:eu-repo/semantics/openAccess