PRELIMINARY STUDY ON BIOLOGICAL CHARACTERISTICS OF DENDROLIMUS PUNCTATUS AND BIOLOGICAL CONTROL OF IT

Dendrolimus punctatus has 2-3 generations a year in Fujian,1 and 2 instar larvae takes food in groups, imago is active in the day and keeps quiet at night and the active peak time is 21:00 to 23:00, and imago has a high phototaxy . The female imago average amount of ovum are 193. The toxicity of Tishi against the 4th instar larvae of Dendrolimus punctatus was measured in lab. The result shows that Tishi has a obvious efficiency to Dendrolimus punctatus and larvae LC 50 is 0.000154 mg/ml after 48h. All these studies provide a basis for IPM of Dend rolimus punctatus.