Abstract: Biological characteristics including conidia germination, colony growth, liquid and solid fermentation associated with mass production were investigated. These strains is highly toxic to Homoptera insects. The results showed that two of them were considered as good strains for mass or industry production as well as pests control. One is isolated from a orchard at north of Fujian province, with a germination rate of 90.1% in 12 h, growth rate of 0.385cm/d, and conidiation rate of 1.091×10⁹ blatospores/ml in liquid culture for 72 h, and of 5.525×10⁸ conidia per dish in solid culture for 7 d, another strain LB-035 with a conidia germination rate of 94.5% in 12 h, a colony growth of 0.356cm/d, and of 1.210×10⁹ blatospores/ml in liquid culture for 72 h, and of 3.806×10⁸ conidia per dish in solid culture for 7 d.