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本文总结了1982年春、秋两季释放不育小菜蛾的田间防治效果。春季辐照虫与野生虫之比为4.5:1,连续释放6次,F_1代防治效果达84.1%。秋季辐照虫与野生虫之比为4.7:1,释放10次(连续二代),F_1、F_2代卵不育率为79.0%和81.7%;群体生活历期延长,F_1代推迟4天,F_2代推迟12天,使年发生代数减少;蛹期延长,幼虫期缩短;F_1代防治效果达80.8%,F_2代防治效果达79.1%。
This article summarizes the 1982 spring and autumn release of sterile diamondback moth field control effect. In spring, the ratio of irradiated insects to wild insects was 4.5: 1, which was continuously released 6 times. The control effect of F_1 generation was 84.1%. In autumn, the ratio of irradiated insects to wild worms was 4.7: 1, released 10 times (for the second generation), the rate of ovary inoculation on F_1 and F_2 was 79.0% and 81.7% F_2 generation deferred for 12 days, so that annual algebra was reduced; pupal stage was prolonged and larval stage shortened; F 1 generation control effect was 80.8%, F 2 generation control effect was 79.1%.