公主岭地区小菜蛾发生动态和世代的研究

Population Dynamics and Generation Differentiating of the Diamondback Moth, Plutella Xylostella L. in Gons Zhuling

１９８８年在公主岭的春、夏、秋三茬甘蓝田系统调查了各虫态数量，性诱器监测了成虫数量。结果表明，１９８８年小菜蛾在公主岭主要发生４代，部分发生５～６代。

Results showed that BBM mainly occurred 4 generations and partly 5～6generations.The immigration adults, all stages of 1st and 2nd seneration occurred on spring cabbage. The adults of 2nd generations migrated into the summer cabbage field and consequently 3rd generation occurred. The 4th and 5th generation occurred on the autumn cabbage field.