徐州地区烟粉虱发生规律及治理措施初探

Occurring rules of Bemisia tabaci in Xuzhou area and its control measures

通过近2a观察表明,徐州地区烟粉虱在田间消长大致分4个阶段,成虫有4个主要迁移期;其喜干热、耐高湿的生活习性、冬季保护地栽培面积的扩大、外来虫源的传入及防治不力是烟粉虱种群数量累积并引起暴发的主要原因;主要寄主有9科20余种栽培作物;寄主植株上虫量垂直分布:棉花上部>中部>下部,温室蔬菜一般中、下部>上部。可采取严格检疫、清洁田园、轮作换茬、黄板诱杀、覆盖防虫网、保护和利用天敌、药剂防治等措施进行治理。

s: It was indicated by observations for two years that the occurrence of Bemisia tabaci in Xuzhou area could be divided into four stages and there were four migration periods of their adults. The main reasons of its population resurgences and outbreaks were: its preferences for dry, high temperature with high moisture environments, the expansions of green house and mulching fields in winter, the immigration of external Bemisia tabaci and inefficacious control measures. More than twenty kinds of crops belonging to nine families were host plants of Bemisia tabaci. They vertically distributed in host plants. In cotton plants, Bemisia tabaci infested the upper parts of the plants the most, and middle part and lower parts the next; the populations of Bemisia tabaci in the middle and lower parts of vegetables in greenhouses were more than those in their upper parts. The control measures such as strict quarantine, field hygiene, crop rotation, trapping with yellow sticky cards, covering with insect proof net, protecting and using natural enemies, applying pesticides could be applied to control Bemisia tabaci: