米蛾卵饲养东亚小花蝽的关键点研究

Preliminary researches in mass rearing of predatory natural enemy insect Orius sauteri (Hemiptera: Anthocoridae)

本研究在实验室条件下,评价了以米蛾Corcyra cephalonica卵作为东亚小花蝽Orius sauteri替代饲料的饲养效率及其对米蛾卵的取食量等,探讨了成虫最佳饲养密度和最佳产卵基质等繁殖关键技术点。结果发现,东亚小花蝽取食米蛾卵可以满足全世代生长发育的营养需求,单雌均产卵量为70.5±4.2粒,种群指数为22.18;东亚小花蝽雌成虫一生需要取食米蛾卵183.8±5.4粒;以每对成虫50 cm3的空间密度饲养东亚小花蝽成虫时,其单雌产卵量最多(70.2±3.2粒),与雌成虫单头饲养时的产卵量(70.5±4.2粒)相近;在供试的四种产卵基质中,东亚小花蝽偏好选择白芸豆Phaseolus Bulgaris嫩茎和具叶柄叶片作为产卵基质,其卵的孵化率可达91.76%,显著高于发芽的蚕豆Vicia faba种子和夏至草Lagopsis supina嫩茎。以上研究结果可为东亚小花蝽的规模化饲养提供有价值的技术依据。

In our researches, we evaluated the feeding efficiency of Orius sauteri fed on C. cephalonica eggs, and the consumption of C. cephalonica eggs, identified the key technologies of the optimum rearing density and oviposition substrates. These studies founded that O. sauteri fed on C. cephalonica eggs could compete the development and reproduction. The average amount of spawning per female was 70. 47 ± 4.21, and the population index was 22. 18 ; About 183.76 ±5.43 eggs of C. cephalonica were consumed in O. sauteri＇s lifetime; the optimum rearing density of O. sauteri adult was 50 cm3 per couple, and the average amount of spawning per female was about 70. 17 ±3.17 at this rearing density, which was no significate difference with that female reared alone. O. sauteri prefered laying eggs in immature stem and leaves （petiole included ） of white kidney bean （Phaseolus bulgaris ） compared with the other two substrates （germinated Vicia faba seeds and Lagopsis supina stems ）. The hatching rate was upto 91.76%, which was significant higher than the other two. The research results above mentioned could be valuetechnical base in mass rearing of O. sauteri.