落叶松红瘿球蚜生物学特性及防治研究初报

落叶松红瘿球蚜是危害云杉、青海云杉枝梢嫩芽的一种重要害虫。在甘肃甘南林区１年发生２代，未发现有性世代和第２寄主，为不完全生活史型。该越冬蚜虫从翌年５月上旬开始活动，中、下旬产卵。６月上旬越冬成蚜和第１代若蚜取食刺激形成虫瘿，瘿蚜在瘿室内３龄，７月中、下旬至８月上旬虫瘿开裂羽化为具翅瘿蚜活动产卵，８月上、中旬卵孵化，１龄若蚜（越冬蚜）于９月中旬至１０月初在枝梢顶端叶基或芽基越冬。在第１代１龄若蚜越冬前，春季越冬蚜产卵前和瘿蚜羽化产卵前用５０％抗蚜威可湿性粉剂２０００～２５００倍液防治，防治效果达９０％以上。

Preliminary Research on Biological Characteristics and Control of Sacchiphates roreigallis Li et Tsat

Sacchiphates roreigallis Li et Tsat is an importnt insect pest to harm shoots bud of the end of branch. It grows two generations in forest district in Gannan one year. Its sexual generation and the second host of parasite haven't been found. It should be part of type of incomplete history of life. We find out the pattern of activities of this insect. Three kinds of pesticide to kill the insects have been used in different density in different period and the effect of the insedicide exceed 90 %.