苹果蠹蛾和梨小食心虫迷向剂复合干扰在南疆‘库尔勒香梨’园的应用效果

‘库尔勒香梨’园苹果蠹蛾、梨小食心虫同域混合发生,均钻蛀隐蔽为害,且抗逆性强,致使化学农药使用频繁而防效低下,已严重制约南疆特色‘库尔勒香梨’产业发展。通过田间性迷向干扰试验,测定了苹果蠹蛾和梨小食心虫性迷向剂在阿克苏地区‘库尔勒香梨’园(约9hm²)的应用效果。结果表明:苹果蠹蛾在该果园1年发生4代,梨小食心虫1年发生5代;性迷向剂胶条600、900、1200个/hm²处理的迷向率均在94%以上,复合迷向干扰效果明显优于对照。蛀果率调查结果显示,7月10日和8月10日性迷向剂胶条600、900、1 200个/hm²处理的蛀果率分别为0.50%、0.25%、0.13%和0.38%、0.25%、0.13%,均显著低于对照,整体上随时间延续防效更为明显。综上,采用性迷向剂对苹果蠹蛾和梨小食心虫进行复合干扰迷向防治有良好的效果,且具有环境友好的优势,综合考虑成本,建议田间使用性迷向剂胶条900个/hm²为宜。

Effects of the compound interference of Cydia pomonella and Grapholitha molesta in 'Korla fragrant pear' orchard in South Xinjiang

Cydia pomonella and Grapholitha molesta are important fruit borers of ‘Korla fragrant pear’ orchard in South Xinjiang region, which have the latent threat to ‘Korla fragrant pear’ industry on account of some adaptable characteristics such as hidden habitat, boring damage, strong stress resistance to adversity and mixing co-occurrence on the same host plants. Chemical pesticides is frequent, but the control effect is low. It is particularly urgent and important to explore their new control approaches. In this study, the field sex interference test was used to determine the effect of C. pomonella and G. molesta on the ‘Korla fragrant pear’ orchard(about 9 hm²). The results showed that there were 4 generations in C. pomonella and G. molesta 5 generations a year in the orchard. The interference effect of 600 pieces/hm², 900 pieces/hm² and 1 200 pieces/hm² of the interfering agent bag was very significant. The disorientation rate of 600 pieces/hm², 900 pieces/hm² and 1 200 pieces/hm² were all above 94%, and the effect of compound stray interference was better than that of control. The results of fruit decay rate in July 10 th and August 10 th showed that the rate of fruit borers was 0.50%, 0.25%, 0.13% and 0.38%, 0.25%, 0.13%. The overall control effect was more obvious on the whole with time. To sum up, the use of sex interfering agent has good control effect on the control of C. pomonella and G. molesta, and has the advantage of environment friendly. Based on the comprehensive consideration, it is suggested to use 900 pieces/hm² of disorientation adhesive strips in the field.