Abstract:

In this study,the effects of major environmental factors on the growth and insecticidal activity of antarctic fungi Gliocladium catenulatum T31 were investigated.The method of micro-plate was employed.The bioactivity of the strain T31 to Diamondback Moth(Plutella xylostella) was studied with insect mortality as evaluated index.The most insecticidal activity of T31 fermentation broth was 60.42%.After acetic ether extracted T31 fermentation broth repeatedly,dissolved by acetone at the concentration of 0.33mg/mL,the best insecticidal activity of T31 fermentation broth extracts was 82.05% and insecticidal activity of T31 mycelium extracts was 76.92%.The potted experimentation showed that the controlling effect of T31 fermentation broth to Diamondback Moth was 54.2% on the seventh day.