Acessibilidade / Reportar erro

EFFICIENCY OF ISOLATES OF METARHIZIUM ANISOPLIAE FOR THE CONTROL OF SUGARCANE ROOT SPITTLEBUG MAHANARVA FIMBRIOLATA (HOM.: CERCOPIDAE)

ABSTRACT

The objective of this research was to evaluate the efficiency of isolates of Metarhizium anisopliae in the control of Mahanarva fimbriolata on sugarcane. The experiment was conducted in Sertãozinho, SP. The experimental design consisted of blocks with seven treatments and four repetitions with the isolates CB 10 (M. fimbriolata - Inst. Biological), ESALQ 1037 (Thumb-tack of the soybean - Paraná) and PL 43 (M. posticata - PLANALSUCAR Nordeste) with three or four applications. The isolates were applied in the concentration of 1x107 conídios/mL with sprayer for CO2 with of 200 liters/ha. Six evaluations were accomplished, being one before the applications, and five after the applications: 30, 60, 81, 101 and 131 days. At 0 days the infestation was of 2.5 nymphs/meter. It was verified that isolates CB 10 and ESALQ 1037, applied on three and six applications, maintained the population of nymphs below 3 lineal nymphs/meter, being considered isolates promising for the biological control of M. fimbriolada, with application in November.

KEY WORDS:
Control microbial; insecta; biological control; Metarhizium anisopliae; Mahanarva fimbriolata.

Instituto Biológico Av. Conselheiro Rodrigues Alves, 1252 - Vila Mariana - São Paulo - SP, 04014-002 - São Paulo - SP - Brazil
E-mail: arquivos@biologico.sp.gov.br