桃小食心虫Carposina niponensis防治技术研究

 本文报道了桃小食心虫在云南大理地区的发生及为害:以年生1代为主,第1代成虫出现在雨季开始(6月份)的第10～12天;亦有少量第2代成虫出现在8月上旬。幼虫能危害苹果、梨等多种水果。第1代成虫开始产卵,当卵果率达1～2%时是化学防治的最适期。防治试验结果表明对苹果和梨的防效分别为90%以上和83.1%。该项预测及防治方法对水果增产有一定效果。

Study of the Control of Peach Borer

This paper reports the occurrence and chemical control of peach borer (Carposina niponensis) In Tali Bai National Autonomous District the peach borer generally produces one generation and occasionally two in a year. The adults of the first generation a pear 12 days after the beginning of the rainy season in June, and the second in August. Its larvae seriously damage the fruits of apple, pear and many other fruit trees. It is proper to use chemicals while insect eggs are being deposited on 1～2% the fruit and the adults are beginning to emerge. The control in four orchards was 90% effective in apple trees and 83.1% effective in pear trees with a spray of cyhalothrin, sumicidin or omethate (1:200～300X, respectively) 30～40ml for every 20 trees.As a result, the forecast and chemical control are of great benefit to fruit production.