EFEITO DOS ISOLADOS DE Metarhizium anisopliae (METSCHNIKOFF) SOROKIN (HYPOCREALES: CLAVICIPITACEAE) SOBRE PARASITOIDE Cotesia flavipes (CAMERON, 1891) (HYMENOPTERA: BRACONIDAE)

Abstract

Palavras-chave: Cana-de-açúcar. Controle microbiano. Entomopatógenos. SUMMARY:The objective of this study was to evaluate the effect of isolated Metarhizum anisopliae on larval parasitoid Cotesia flavipes. The experiment was conducted at a temperature of 25±1°C, RH 70±10% and 12h photophase, using a completely randomized design with 16 treatments and five repetitions, with a total of 10 adults C. flavipes by repetition. We used the following treatments: control (untreated), isolates UFGD 05, IBCB 348 and IBCB 425 at concentrations of 1.0  10 7 ; 0.5  10 8 ; 1.0  10 8 ; 0.5  10 9 e 1.0  10 9 conidia.mL -1. The insects were placed in plastic tubes of type Falcon ® , containing a piece of filter paper inoculated with 1 mL -1 of fungal suspension and a gout of honey. The results showed that the isolates UFGD 05, IBCB 348 and IBCB 425 had low virulence to adult parasitoids C. flavipes.Keywords: Sugar cane. Microbial control. Entomopathogens. INTRODUÇÃOA cana-de-açúcar representa um dos principais produtos agrícolas do Brasil, o plantio da cultura é expandido a cada ano e atualmente a área cultivada ocupa aproximadamente 8 milhões de hectares do território nacional (CONAB, 2011).