Test of vitality of fungus Beauveria bassiana (Bals.) Vuill. Eggs and larvae of moth Figs Ephestia cautella (Walk.) (Lepidoptera: Pyralidae)

Abstract

AbstractThe results showed the effect of different concentrations (1x 104, 1x 106, 1x 108) Spore / ml aqueous suspension of commercial isolation of the fungus Beauveria bassiana (Bals.) Vuill. on eggs and second and fourth larval instars of the moth figs Ephestia cautella (Walk.) Under laboratory conditions. The lowest hatching rate at 1 x 108 spore / ml was 15.3% after 5 days of treatment and was 60.7% at a concentration of 1 x 104 spore / ml. The rest of the larvae were followed until they reached the stage of the pupa and the adult. The mortality for the second larval instar were highest at 1 x 108 spore / ml after 7 days of treatment reaching 85.22%, The lowest rate is 5.6% after 2 days of treatment at 1 x 104 spore / ml concentration. The concentration of 1x 108 spore / ml had the highest effect after four days of treatment on the fourth larval instar the mortality was 89.6%. The lowest percentage pupation was 52.7%, and the lowest adults emerging was 50.2%.