白蛾周氏啮小蜂规模化繁育技术要点及生防效果调查研究试验

Technical Points for Large-scale Breeding of Chouioia cunea and Study on Its Biocontrol Efficiency

通过多年白蛾周氏啮小蜂规模化繁育试验,济南军区黄河三角洲生产基地总结出白蛾周氏啮小蜂规模化繁育从繁育基地选址、规划设计,到繁育架与繁育箱的定做标准,以及繁育阶段的蜂种培养、摆蛹、接种、封箱、挑烂、计数、装箱等技术要点。为使室内大规模繁育与林内释放有机结合,提高生物防控效率,通过在发生美国白蛾林地内释放周氏啮小蜂,分别选择不同密度、次数、年份进行调查研究试验,结果表明,选择一、二代美国白蛾5龄以后老熟幼虫期至化蛹初期,在天气晴朗的早晨9:00-11:00时间段释放效果较好,释放次数为每年4次,释放数量以每次225个/hm2寄生良好的周氏啮小蜂茧较为经济,效果较好。

After years of large-scale breeding trial on Chouioia cunea in Jinan Military Region of the Yellow River Delta production base, the standards for breeding place selection, planning and design, and customized breeding shelves and boxes, together with key technical points for larva culturing, placing, implantation, sealing, picking, counting, and packaging have been summarized. In order to combine the large-scale indoor breeding with the release in forest, and to improve the biocontrol efficiency, Chouioia cunea in forest impaired by Hlyphantria cunea was released, and the releasing experiments with different density, frequency, and years were conducted. The results show that the good and economical releasing effects can be reached at 9-10 AM during sunny days with the first and second generation of fall webworm from the fifth mature instar larvae period to early pupation period for 4 times a year based on a releasing density of 225 well-paratisized Chouioia cunea per hm2 every time.