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.

摘要： 本文报告拟啮小蜂在黑胸火蠊卵荚内越冬情况,并遵循其自然越冬规律,进行低温贮存寄生卵荚等研究。结果表明:①拟啮小蜂在黑胸大蠊卵荚内越冬后,于翌年5月中旬至7月上旬的54天中羽化,羽化高峰在6月中旬,占全部羽化卵荚的46.6%;②拟啮小蜂以预蛹期在卵荚内越冬,当月平均室温达16.8℃时,已有25.9%的预蛹发育到蛹,并首次出现发育到成蜂的卵荚;③低温(5.8℃)贮存123～132天的越冬寄生卵荚,可推迟成蜂羽化期1～4、5个月,成蜂羽化率随时间延长略有降低;利用这一技术贮存寄生卵英,可控制成蜂的羽化时间和数量;④经低温贮存后,不能将卵荚直接置于高温和低湿环境,否则将造成卵荚内寄生蜂的大量死亡;⑤低温贮存当年寄生的美洲大蠊卵荚,至少可推迟拟啮小蜂羽化期1～2个月,羽化率与对照组无明显差异。

关键词: 拟啮小蜂, 越冬, 寄生卵荚, 低温贮存, 推迟羽化期