In-door Toxicity and Chemicals Sensitivity of Verticillium lecanii on Aphis sp.on Lycium chinense
LIU Hao1，2，ZHANG Long1*，ZHANG Zong-shan2
1Key Laboratory for Bio-control of Pests，Ministry of Agriculture，China Agriculture University，Beijing 100193，China|2Key Laboratory for Controlling Plant Diseases and Insect Pests，Institute of Plant Protection，Ningxia Academy of Agriculture and Forestry Sciences，Yinchuan 750002，Ningxia，China
Abstract：To definite the chemical inhibition to Verticillium lecanii and control effect of V. lecanii to Aphis sp.，4 strains Verticillium lecanii were studied by methods of testing the percentage of bacterial inhibition and conducting bioassay in door．The results showed that the fungicide Kresoxim-methyl and the insecticide Acetamiprid were safe to V. lecanii．Conduct results showed that No.1 strain was the best．LD50 and LT50 of which were 1.8×105 spores?mL-1（regression equation y = 0.209x + 3.904）and 4.89 days（regression equation y = 0.650 3x + 1.840 4），respectively．
