香樟楠片盾蚧生物学特性及其防治

Bionomics and control of Parlatoria machili

香樟楠片盾蚧Parlatoria machiliTakahashi是樟树上的一种重要害虫,主要危害樟叶。该虫在浙江余姚1 a发生3代,以老熟若虫和蛹在寄主叶面和枝条上越冬。翌年3月中旬、6月上旬和8月中旬是越冬代、第1代和第2代成虫出现期,4月上旬、7月上旬和9月上旬是第1代、第2代和第3代若虫出现期。第1代卵3月下旬出现,第2、第3代卵期不易区分。该虫世代重叠,每年3月下旬至11月中旬均能见到各虫态。若虫发生期可选用28%蚧宝乳油、40%速扑杀乳油、48%乐斯本乳油等药剂进行防治,防效可达75%～80%。

Parlatoria machili is an important pest defoliating Cinnarnornum sp.. It has three generations a year and overwinters as mature nymph and pupa on the leaves and branches of the host. The adults of the overwintering, 1st and 2nd generations emerge in mid March, the first ten days of June and mid August respectively. The nymphs of the 3 generations hatch in the first ten clays of April,July and September. Eggs of the 1st generation appear in the last ten days of March. The generations overlap. All morphs of the insect exist in the period between the last ten days of March and mid November. The control effect of the application of 28% Jiebao EC against the nymphs is 75 %-80 %.