盐城农区B型烟粉虱的发生特点与综合控制技术研究

Studies on Occurrence Characteristics of B-type Bemisia tabaci and Its Integrated Control Techniques in Yancheng Area

盐城农区B型烟粉虱具有生物型单一、适生寄主众多、扩散转移频繁、发生面积逐年扩大、发生时期逐年提前、为害程度逐年加重、分布转移趋嫩等特点;栽培保护地面积的逐年增加、高温干旱条件、大量适生寄主构成丰富的食物链、抗药性与防治难度的加大等因子是构成烟粉虱暴发的重要原因;针对当地烟粉虱的发生特点,提出了“立足虫源地、主控越冬代、严把检疫入口关与加强监测”的原则,强调“坚持以农业防治、生物防治为主,化学防治为辅”的综合治理对策,采用“治虫源、控蔓延,治园区、保大田”的化学防治策略。

The B - type Bemisia tabaci in Yancheng area have the following characteristics： single biotype, plenty of proper host plants, frequent transfer, yearly - expanding occurrence area, ahead of occurrence time, aggravating damage, tender distribution and transfer. Yearly - expanding protective cultivation area, high temperature and drought condition, abundant food chains which consist of many suitable host plants, resistance to pesticides and difficult prevention are the important reasons for causing the outbreak of Bemisia tabaci. The control strategy is put forward based on the occurrence characteristics of the insect pest, that is ＂setting emphases on insect sources, mainly controlling overwintering generation, strengthening quarantine and monitoring＂. The integrated control countermeasure is given as follows： giving priority to agricultural and biological control assisted with chemical control. The chemical control strategy is controlling insect sources for preventing spread, controlling the pest in garden district for protecting the farmland.