关键词: 拟啮小蜂, 越冬, 寄生卵荚, 低温贮存, 推迟羽化期

Abstract: This is a report of studies on the overwintering of oothecal parasite Tetrastichodes sp. within the oothecae of cockroach Periplaneta fuliginosa and especially taking low temperature to store parasitic ootheca by first utilizing natural overwintering rule. 1. After their overwintering within the oothecae, the Tetrastichodes sp. emerged during the 54 days period next year from the second ten days of May to the first ten days of July The emerging peak was in the second ten days of June, 46.6 percent of the total number emerged daring these ten days; 2. This species lived through the winter in the prepupa stage. 25.9 percent of them developed from prepupa to pupa, when the monthly average room temperature was 16.8℃, And oothecae that had developed into adults appeared for the first time; 3. Adult may be delayed emergence period 1 to 4.5 months, when it is stored 123 to 132 days in low temperature. The emergence percentage has a little reduction by elongating the store-time. This can be used as a technique to store parasitic oothecae and control the time and number of adult emergence; 4. After being stored in low temperature, the oothecae mist not be placed directly in a place of high temperature and low relative humidity, otherwise, vast majority of parasites may die within the oothecae; 5. Storing in low temperature the parasitic oothecae of Periplaneta americana of the same year may delay the emergence of Tetrastichodes sp. for at least 1～2 months. The emergence percentage is not evidently different from that of the control group.