马尾松毛虫对药剂的敏感性及防治应用

Studies on the Seasonal Susceptibility of Masson Pine Caterpillar to Insecticides and Its Application

以马尾松毛虫４～５龄幼虫为对象，测定了南京、广州两地试虫在不同季节中对溴氰菊酯和灭幼脲Ⅲ号的敏感性。研究发现，不论是广州还是南京，在一年中该虫越冬代幼虫对杀虫剂均表现敏感，这是化学防治适期。研究中以血淋巴中的血细胞和酯酶为指标，分析了敏感性变化的生理生化机制，并对马尾松毛虫综合防治中的化学防治进行了探讨。

The seasonal susceptibility of masson pine caterpillar to insecticides werestudied.It was found that the larvae before hibernation was the most sensirive todeltamethrin and dimilin Ⅲ in Nangjin, Jiangsu Province and Guangzhou, GuangdongProvince. The total haemocytes counts,esterases activity was found to be lowest and it wasalso the suitable time to control this pest by chemical insecticides. The mechanism of the sea-sonal adaptation of the larvae was discussed.It was suggested that the chemical controlstrategies should be focused on the selection of suitable chemical and the timing of applica-tion to coincide with the susceptible life stages.