米蛾人工饲养技术优化

随着天敌昆虫如赤眼蜂、草蛉等的广泛应用，天敌寄主的繁育作为天敌生产的重要环节，也越来越受到关注。米蛾Corcya cephalonica Stainton因其饲料容易获得，且不受季节、地域的限制，可以终年在室内繁殖，是替代常规用大卵如柞蚕卵的理想寄主。但环境条件和饲料配方制约米蛾繁育效率。其生长发育的温湿度阈值分别为17~35℃和15%~80%；工厂化繁育时采用的基础饲料配方为玉米粉70%+大豆粉20%+麦麸10%。本试验围绕4个因素（温度、湿度、饲养密度和饲料配方）进行了4因素3水平正交试验。结果表明，在温度25~28℃，相对湿度72%~82%、饲养密度为8000~10000（粒/kg饲料）时米蛾的发育历期最短，出蛾相对较集中，繁殖倍数较高，且单雌产卵量较高，此时最有利于米蛾的生长发育。

Optimization of Artificial Rearing Technology for Corcya cephalonica Stainton

With the wide application of natural enemies such as Trichogramma and Chrysopa perla, the rearing of the hosts, which is an important part in the mass production of natural enemies, has aroused great interests. Studies have shown that the rice moth Corcya cephalonica Stainton can be reproduced indoors all year round owing to the easy availability of feed, adaptability to the seasons and regions. The rice moth is an ideal substitute host for large host eggs such as Antheraea pernyi. But the reproduction efficiency is restricted by environment factors and feed formula. The threshold of the temperature and humidity for the growth and development is 17-35℃ and 15%-80%, respectively. The basic formula for rice moth rearing is 70% corn flour+20% soybean flour+10% wheat bran. In this paper, we did an orthogonal test with four factors of temperature, humidity, rearing density and feed formula (treatments A-I) at three levels. The results showed that when the temperature ranged from 25 to 28℃, relative humidity was 72% to 82%, rearing density was 8000 to 10000 rice moth eggs/kg, the developmental duration of rice moth was the shortest. Moreover, the emergence of rice moth was relatively concentrated, the reproductive rate was higher, and the mean fecundity was higher. Therefore, these conditions were conducive to the growth and development of rice moth.