不同剂量信息素缓释迷向剂防治苹小卷叶蛾的比较

Comparison of different dosages of sex pheromone for disrupting the mating of Adoxophyes orana

【目的】明确信息素缓释迷向剂在不同果园防治苹小卷叶蛾Adoxophyes orana beijingensis Zhou et Fu的持效期及合理使用密度。【方法】本研究采用信息素迷向法,分别于2013、2014年在河南省郑州市应用0.3 g/根苹小卷叶蛾信息素缓释迷向剂防治苹果园和桃园苹小卷叶蛾进行了试验,试验设置600、500、400根/hm^2 3个密度梯度。【结果】桃园中在苹小卷叶蛾越冬代活动前以600、500、400根/hm2处理,处理后124 d的防治效果分别为85.86%、91.98%和70.12%,8月份以后防效显著降低。苹果园中3种密度处理后5个月对苹小卷叶蛾的防效均为100%。【结论】结合防治成本,建议桃园中早熟品种可使用信息素缓释迷向剂400根/hm^2密度进行处理防治苹小卷叶蛾,晚熟品种使用信息素缓释迷向剂500根/hm2以上密度处理,持效性可达4个月,苹果园可使用信息素缓释迷向剂400根/hm2密度进行处理防治苹小卷叶蛾,持效期可达5个月。

[Objectives] To determine the efficacy, duration and most cost-effective dosage of sex pheromones for controlling Adoxophyes orana beijingensis Zhou et Fu in different orchards. [Methods] Sex pheromone dispensers containing 0.3 g pheremone/unit were hung on apple and peach trees at a density of 600, 500 and 400 per hectare to disrupt the mating of A. orana in Zhengzhou from 2013 to 2014. [Results] The control efficacies of 600, 500 and 400 per hectare in peach orchards over 124 days were 85.86%, 91.98% and 70.12%, respectively before overwintering adult emergence, but declined rapidly after August. However, control efficacies of all three densities were 100% in apple orchards over a 5 month period. [Conclusion] A pheromone unit density of 400 per hectare appearssufficient to control A.orana in mid-early ripening peach orchards but a density of 500 per hectare or higher was required in late-mature orchards. The duration of control was 4 months. A density of 400 units per hacouldbe enough to keep Adoxophyesorana at low density in apple orchards for 4 months.