The cold hardiness of overwintering larvae of Acantholyda posticalis matsumura(Hymenoptera: Pamphiliidae)in Taian
泰安地区松阿扁叶蜂越冬幼虫抗寒性

The pine sawfly,Acantholyda posticalis Matsumura is one of the key insect pests foraging on the pine leaves,and it overwinters as larvae in the soil of pine forest.The cold hardiness of overwintering larvae can make direct effects on its population and damage on the pine trees in the next year.The supercooling capability of the overwintering larvae were determined and the location,the stadium and the mortality of the larvae were surveyed during the winter in the pine forest.The results showed that the super...