Evaluation of entomopathogenic fungus Verticillium lecanii (Zimmermann) Vieges and the predator Chrysoperla carnea (Stephens) against cowpea aphid, Aphis craccivora (Koch) on faba bean in EGYPT

Abstract

Evaluation of entomopathogenic fungus Verticillium lecanii (Zimmermann) Vieges and the predator Chrysoperla carnea (Stephens) against cowpea aphid,Aphis craccivora (Koch) on faba bean in EGYPT ABSTRACT Three tested treatments of the entomopathogenic fungus Verticillium lecanii (Zimmermann) Vieges, the predator Chrysoperla carnea (Stephens) and V. lecanii followed by release of C. carnea in faba bean field for controlling cowpea aphid, Aphis craccivora (Koch) compared with control were conducted. The first treatment was V. lecanii repeated 4 times at 15-days intervals at the rate of 10 8 spores/ml. The second was C. carnea at the same intervals at the rate of 12,000 predator [larvae (L2)]/feddan/releases. The third was V. lecanii applied 2 times at 15-days intervals at the same rate followed by release of C. carnea 2 times at 15-days intervals at the same rate. Treatments were conducted during 2006-2007 and 2007-2008 at a location in Ismailia Governorate. These treatments indicated the potential use of these treatments to control A. craccivora on faba bean. Reduction in A. craccivora population and subsequent yields were significant between treatments. Highest reduction and yield gain was observed when fungus V. lecanii was applied.

Susceptibility of Ephestia cautella ( Walk.) to entomopathogenic fungus Verticillium lecanii (Zimm.) Preparation

“…For females (24 hours), treated with concentrations of (10 5 , 10 3 and 10 1 ) spore / mL of survival for (11.6, 12.0 and 12.1) days respectively Compared to control treatment, the female of survival was 18.1 days. The results of a study by Abd El-Gawad and Atef (2008) showed the success and effectiveness of using the Verticillium lecanii fungus suspension at 10 8 spore / mL and the C. carnea ( Stephens) larvae second instar together in the control of aphis bean Aphis craccivora in Egypt. This study was revealed that the spore suspension of the Verticillium lecanii was very effective against E.cautella and it can be used as a biocontrol agent against this pest.…”