Original paper

The effect of the entomopathogenic fungus Lecanicillium longisporum (Petch) Zare & Gams (Hypocreales: Cordycipitacea) on the aphid parasitoid Diaeretiella rapae McIntoch (Hymenoptera: Braconidae, Aphidiinae)

José da Silva, Robson; Martins, Ivan Carlos Fernandes; De Conte Carvalho de Alencar, João; Pereira da Silva, Karen; Cividanes, Francisco Jorge; Duarte, Rogério Teixeira; Agostini, Lucas Trevisoli; Polanczyk, Ricardo Antonio

Entomologia Generalis Volume 36 Number 3 (2017), p. 219 - 229

published: Jul 1, 2017
manuscript accepted: Feb 3, 2016
manuscript revision received: Sep 18, 2016
manuscript revision requested: Jul 16, 2016
manuscript received: Jan 14, 2014

DOI: 10.1127/entomologia/2017/0072

BibTeX file

ArtNo. ESP146003603003, Price: 12.10 €

Download preview PDF Buy as PDF

Abstract

Abstract The effect of the entomopathogenic fungus Lecanicillium longisporum on the parasitoid Diaeretiella rapae was evaluated under laboratory conditions. M. persicae nymphs were first exposed to 1-day-old mated parasitoid females for 24 h and then sprayed at different intervals with a solution of L. longisporum. The aphids were primarily sprayed with a solution of the entomopathogen and then exposed to parasitism at different time intervals. The parameters evaluated were parasitism rate, emergence rate, the period between oviposition until mummification, the period between oviposition until emergence, sex ratio (F1 generation), and longevity of F1 generation females. Parasitism was reduced from 66.47 to 17.75% from previous spraying of the entomopathogen on M. persicae. Parasitoid emergence was affected in treatments consisting of spraying L. longisporum immediately (0 h) after or before parasitism. Decreases in the longevity of adult females from the D. rapae F1 generation were related to the presence of the entomopathogenic fungus. The results indicate that there are two biological control agents that can be used in IPM systems against M. persicae, but this relationship requires some caution in order to avoid antagonistic interactions in the field.

Keywords

interactionbiological controlnatural enemyentomopathogen