小菜蛾人工饲养方法比较

Comparison of Artificial Rearing Methods for Plutella xylostella L.

比较了离体菜叶法(养虫缸法)、蛭石萝卜苗法、甘蓝苗活株法(养虫笼法)3种饲养小菜蛾的方法。结果表明:离体菜叶法(养虫缸法)的幼虫死亡率高;蛭石萝卜苗法,萝卜苗不耐吃,更换频率高,湿度不易控制,幼虫化蛹位置不固定,不便收集;甘蓝苗活株法(养虫笼法),成活率高,长势均一,且能缩短生育历期1～3d,是较为适宜的方法。

Three artificial rearing methods for Plutella xylostella L.were compared,which were reared on in vitro cabbage leaves（rearing jar）,radish seedlings on vermiculite and cabbage seedlings（rearing cage） respectively.The results showed that the larva mortality was higher when reared on the in vitro cabbage leaves.The radish seedlings could be used up very soon and need to be replaced frequently,so it was very difficult to control the humidity and to collect the pupas because of the unfixed pupation position.When reared on the cabbage seedlings,the larvae had higher survival rate and grew homogeneously with the duration of growth and development shortened for 1～3 days,so it was a better method for rearing Plutella xylostella L.