Culture Conditions Effect on Ferment Liquid Activity of Paecilomyces griseoviride Strain U-2 against Aphids

摘要

Based on the result of biological assays, the current study determined the suitable conditions of Paecilomyces griseoviride strain U-2 to produce active substance for aphid control. The conditions were: Potato Dextrose Agar (PDA) media with initial PH 6.0 added in 0.18% MgCl2, 0.3% citrate sodium and 0.4% beef extract; the strain U-2 of Paecilomyces griseoviride was cultured for 6 days on the PDA media in culture flasks and shaken in 26-28 °C,at 200 rpm.