桑螟在四川南充蚕区桑园的发生规律及防治策略

Occurrence and Control Strategies of Diaphania pyloalis Walker in Mulberry Fields of Nanchong Sericulture District,Sichuan

桑螟(Diaphania pyloalis Walker)是桑树的主要害虫之一,在四川南充蚕区桑园的发生危害较严重。为有效控制桑螟对桑树的危害,调查了桑螟在该区域的生活史、生活习性、发生规律、为害特点等,并在此基础上提出了防治策略:重视虫情预测预报;通过养蚕布局错开害虫暴发期;使用短、中、长效农药增强化学防治效果;冬季桑园清理降低害虫越冬代虫口基数;发挥天敌昆虫的生物防治作用;结合物理诱杀手段提升防治效果。

Diaphania pyloalis(D.pyloalis)walker is one of the main pests of mulberry trees,which is more serious in the mulberry fields in the silkworm district of Nanchong,Sichuan.In order to effectively control the harm of D.pyloalis to mulberry trees,its life history,living habits,occurrence pattern,and damage characteristics in the area were investigated.The control strategies were proposed on this basis:paying attention to the prediction and forecast of insect situation;stagger the pest outbreak period through sericulture layout;using short-,medium-,and long-acting pesticides to enhance the effect of chemical control;cleaning up mulberry fields in winter to reduce the number of pests overwintering;giving full play to the biological control effect of natural enemies;combining physical booby-trap methods to enhance prevention and control effectiveness.