旋幽夜蛾生物学特性与防治研究

Studies on the Biological Characteristic of Scotogramma trifolii (Rott) and Its Control

旋幽夜蛾为杂食性害虫。通过室内外系统饲养观察,此虫在当地一年发生3代。以蛹在甜菜、胡麻、豌豆、首蓿等作物土壤中越冬,田间杂草、地埂下也能越冬,深度达10～20cm;前两代幼虫主要危害豌豆、胡麻、蚕豆等,第三代幼虫以危害甜菜为主。化学防治采用二嗪农1000倍液、水胺硫磷800～1200倍液喷洒,防效达90％。

Scotogramma trifolii (Rott) is a polyphagia insect pest, there generation occurred in a year under local condition by the observation and systemic feeding in the field and indoor. Overwintering as pupa in the soil of sugar beet, helminthosporium, pea, alfalfa and etc. It also overwintered on the weeds in the field and under balk (ridge), with the depth reaches 10-20cm, the larvae of the 1st and 2nd generation harmed the pea, hclminthosporium and broad bean mainly, and 2nd generation harmed sugar beet, spraying with 1000 ppm of diazuion, 800 ppm of phoxin for chemical controlling, the controlling result is 90%.