Effect of liquid formulations of Pochonia (Verticillium) lecanii (Zimm.) Viegas on viability and virulence against Mealy bug

Effect of liquid formulations of Pochonia (Verticillium) lecanii on growth in culture medium and the subsequent mortality of mealy bug, Maconellicoccus hirsutus were evaluated. The treatment including P. (V) l. + glycerol 8% + tween 80 1% + arachid oil 5% proved to be most effective recording maximum surface coverage (92.0%) and biomass (32.10g) at 10 days of inoculation and bioefficacy at 14 days. However, it was on par to the formulations with P (V) l. + glycerol 5% + tween 80 1% + arachid oil 2% and P. (V) l. + glycerol 2% + tween 80 1% + arachid oil 0.5%. considering viability and virulence. P. (V) l. + glycerol 2% + tween 80 1% + arachid oil 0.5% and P. (V) l. + glycerol 5% + tween 80 1% + arachid oil 2% were emerged as best combinations.