Abstract:

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 periods of wasp abundance.

Key words: Trissolcus halyomorphae, biology, effective accumulated temperature, population dynamics