盐城农区甜菜夜蛾的灾变规律与监控新技术研究

从发生世代与年生活史、适生寄主与嗜好程度、暴发频率与为害程度、发生特点与区域分布、生物学特性与生活习性等角度综合分析了盐城农区甜菜夜蛾的灾变规律;研究总结出外来虫源是造成暴发的主要因素之一,种植结构调整有利于该虫的暴发,夏季干旱少雨为暴发创造了气候条件,频繁使用农药导致该虫的抗药性增加,田间管理粗放营造了暴发的环境条件等影响甜菜夜蛾发生消长的主要因素;提出以搞好农业防治为基础,加强预测预报为前提,狠抓化学防治为重点,利用性诱剂、灯光诱杀、人工捕捉为辅助手段,应用“主攻3代,压前控后”的防治策略等本农区甜菜夜蛾监控新技术。

Infestation Regularity and New Control Techniques of Spodoptera exigua in Yancheng Cropping Area

Infestation regularity of Spodoptera exigua in Yancheng cropping area was synthetically analyzed from the aspects of generation,life cycle,proper host plant and preference to them,damage extent,occurrence characteristics,regional distribution,biological character,life habit,etc.As the conclusion,one of the main factors causing the outbreak of Spodoptera exigua is the exotic population,some advantageous factors to outbreak are as follows: adjustment of cropping structure,drought in summer,increase of pesticide-resistance caused by continually applying pesticides,extensive cultivation.The new monitoring and controlling techniques of Spodoptera exigua were put forward as follows:on the basis of agricultural control and forecasting,laying stress on chemical control,taking sexual attractant trapping,lamp catching and artificial capture as supplementary measures,mainly controlling the third generation.