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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。
In this paper, we report the overwintering of the bee-pollinator in the pod of the black-legged cockroach and follow the natural law of overwintering to study the storage of the parasitized egg pod at low temperature. The results showed as follows: (1) The bee - pollinators emerged in 54 days after mid - May to early July in the following year after overwintering in mid - June, accounting for 46.6% of the total eclosion. (2) The premeditated wasps wintering in the pod within the pre-pupa stage. When the average room temperature reached 16.8 ℃ in the same month, 25.9% pre-pupa developed to the pupa and the first developed into the pod of the bee. ) The overwintering parasitic egg pods stored for 123 ~ 132 days could be postponed for 1 ~ 4 and 5 months, and the emergence rate of adult bees decreased slightly with time. By using this technique to store the parasitic eggs, Of the emergence time and quantity; ④ After low temperature storage, the egg pod can not be placed directly in high temperature and low humidity environment, otherwise it will cause a large number of parasitic wasps within the egg pod died; ⑤ low temperature storage parasitized American cockroach pods, at least Postponing the fecundity of the beetle 1 to 2 months, the emergence rate of no significant difference with the control group.