茶翅蝽沟卵蜂生物学特性和自然种群动态

Biology and Population Dynamics of Trissolcus halyomorphae

茶翅蝽沟卵蜂是茶翅蝽卵期的主要天敌。该蜂雄性先行羽化,1粒寄生卵内出蜂1头,刚羽化的雌蜂即可交配、产卵寄生,每雌平均怀卵量为40.6粒。雌蜂能寄生不同日龄的寄主卵,越新鲜的寄主卵寄生成功率越高。温度与该蜂的发育历期、寿命密切相关,30℃时发育历期最短,寿命最短。全代发育起点温度和有效积温分别是12.2℃和132.5d.℃。补充20%的蜂蜜水能延长成蜂寿命。成虫在田间的2个发生高峰期,分别是6月中下旬和7月下旬—8月上旬。

Trissolcus halyomorphae is an important parasitoid of eggs of Halyomorpha halys. Male emergence is much earlier than female, and one host egg only comes out of a parasitoid. Adults mate and oviposit immediately after emergence. Single female can lay 40.6 eggs averagely. It prefers to oviposit eggs inside fresh host eggs. Developmental period and longevity of the wasp are closely related to temperature. The shortest developmental period occurred at 30℃, and the shortest longevity at higher temperature. The thermal threshold and effective accumulated temperature are 12.2℃ and 132.5 d·℃ respectively. Supplementary nutrition can remarkably prolong adult longevity. The mid and last ten days of June, the last ten days of July and the first ten days of August are the peak penods of wasp abundance.