粉虱在三七上的发生规律初步研究

Preliminary Study of Occurrence of White Fly on Panax notoginseng

为探明三七粉虱的发生规律,通过3年的调查数据,分析了粉虱在不同七龄上的发生危害规律。结果表明,粉虱在三七种植区整年都有出现,害虫在一年中发生高峰期集中在4月中旬至9月下旬。在相同年份,粉虱对不同七龄的三七危害程度,表现为一年七>二年七>三年七,说明粉虱对低龄七危害较重。建议根据发生规律,对三七粉虱的防治采取预防为主、综合治理的方法。

In order to explore the regulation of occurrence of white fly on Panax notoginseng,three years of investigation were conducted in different year-old of Panax notoginseng plantations.Data analyses showed that white flies were found in Panax notoginseng plantations in a year round, dominantly in April and September.The attacks of white fly on different year-old of Panax notoginseng varies in a same year.The order of attacks was one-year-o]d〉two-year-old〉three-year-old,which showed that the attacks of white fly to young seedlings was more serious than older plants. Therefore,we suggested that control measure of white fly should he applied according to the regulation and strictly implement the policy of prevention in the first combined with integrated pest management.