چكيده لاتين :
Studies were conducted on the effect ofculture media, storage temperature and moisture content on viability and virulence of Verticillium lecanii to Brevicoryne brassicae. Among nine media evaluated, Molasses Yeast Broth (MYB) plus 2% Polyethylene Glycol (PEG) maintained the fungus viability higher than other media followed by MYB plus 1% PEG and rice powder. Viability in refrigerator temperature was significantly higher than in room temperature. Among three moisture levels tested, viability at 5 and 10% were on par and were significantly higher than at 150/0. Viability over time decreased and the differences in viability among the three storage times were significant. Storage time and media had significant effect on aphid mortality. Mortality decreased over storage time but the rate of decrease in aphid mortality was less than the rate of decrease in the fungal viability.
