Compatibilidad de Leptolegnia chapmanii con diflubenzuron o aceite de neem para el control de Aedes aegypti

RUEDA PARAMO, M.R; MARIANEL L. FALVO; GARCÍA JUAN JOSÉ; CLAUDIA C. LÓPEZ LASTRA

REVISTA ARGENTINA DE MICROBIOLOGíA

ASOCIACION ARGENTINA MICROBIOLOGIA

Lugar: Buenos Aires; Año: 2019

0325-7541

Leptolegnia chapmanii is pathogenic against mosquito larvae. The compatibility between L. chapmanii and two insect growth regulators (IGR), diflubenzuron and neem oil, was evaluated. Leptolegnia chapmanii was grown in culture media containing different concentrations of each IGR. The mycelial growth was significantly reduced with the highest concentrations of IGR (F6,98 = 268, P < 0.05). However, the production of zoospores (F6,56 = 0.93, P > 0.05) and the larval mortality of Aedes aegypti (F6,56 = 0.95, P> 0.05) were not significantly different among treatments. Furthermore, the percentage of adult emergence in presence of different concentrations of diflubenzuron or a neem formulation was determined, and the pathogenic activity of zoospores was evaluate under the concentrations that inhibit the emergence at 30, 50 and 90%. The pathogenicity of zoospores was not significantly different among treatments (F6,14 = 0.54, P > 0.05), and the larval mortalities were above 90% in all cases.