Sustained effects of trichogramma dendrolimi on ostrinia furnacali | 赤眼蜂防治玉米螟的持续效果分析
2011
Yang Changcheng, Shenyang Agricultural University, Shenyang( China) | Wang Chuanshi, Laoning Wafangdian Agricultural Technology Extension General Station, Wafangdian(China) | Zheng Yanan, Shenyang Agricultural University, Shenyang( China)
Chinese. 摘 要：利用松毛虫赤眼蜂连续3年进行大面积防治玉米螟研究。结果表明：放蜂对当代玉米卯平均寄生率为75．1％，平均防效62．8％，玉米平均被害率减少62．3％。对二代玉米螟的持续效果为蛀孔率下降44．6％，折茎率下降51．9％，平均防效为48．3％。秋末虫量下降幅度在40．8％～49．0％，平均下降率为46．2％。在玉米螟一般发生年份，利用一代放蜂的持续效果可以控制玉米螟的危害。
Show more [+] Less [-]English. Mass reared Trichogramma dendrolimi was released in a large area of corn in to control Asian corn borer, Ostriniafurnacalis. The results showed that the parasitic rate of T.d. on the first generation of corn borer eggs, which increased 62.8% than control, reached to 75.1%; meanwhile, the damage rated of corn reduced 62.3%. The sustained effect of T.d. on the second generation of corn borer showed that the borer rate decreased 44.6%, the bro- ken-stem rate decreased 51.9%, and the average control effect was 48.3%. At the end of autumn, the amount of corn borer decreased 46.2% at the average and restored the loss of 8.5% from 40.8%-49.0%. At the general year that corn borer damaged, the corn borer was controlled by the sustained effect of T.d. on the first generation of corn borer.
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