Bionomics of Lepidosaphes pineti and Its Control

Lepidosaphes pineti Borchesnius is a serious pest of pine tree. The pest is sexual dimirphism, one or two generations per year in Nanping, Fujian and overwinters as the second instar larval or fertilized adult. Its alternation of generation is very serious. The best time to control it is the period of the newly emerged nymph (late May and mid July). The effective insecticides are 20% methidathion by 1:700, 40% fenvalerate by 1:3 000 and so on. The pest has many kinds of natural enemies such as Fusarium coccophilum, Aphytis lingnanensis, Encarsia citrina and so on which should be protected.