松片圆蚧的研究

PRELIMINARY STUDY ON AONIDIELLA TAXUS LEONARDI

松片圆蚧在上海地区一年发生3～4代,以第三代受精雌成虫和第四代二龄若虫在罗汉松叶片上越冬,各代若虫发生或分别在5月上旬～7月下旬;7月下旬～10月上旬;9月中旬～11月下旬;10月中旬～11月下旬。本文还提出了重点防治第一代松片圆蚧的建议,并分析了“敌故灵”的药效试验。

Aonidietla taxus Lconardi has 3 or 4 generations every year in Shanghai. It overwinters on leaves of Yew podocarpus by fertilized female adults of the third generation and two- instar nymphs of the forth generation. The developmental stages of nymphs every generation ranged from middle May to later July , later July to first October, middle September to later November, middle October to later November respectively. The suggestion primarily controlling the first generation was promoted. Finally this paper also discussed the control effectiveness of pesticide named 'Dictcling'.