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甘蓝夜蛾(Mamdstra bressicae L.)是石河子垦区甜菜的重要害虫,严重发生时对甜菜含糖量的影响较大。除危害甜菜外,还为害甘蓝等十字花科蔬菜及禾本科、豆科、茄科等作物。在石河子地区一年发生三代,以蛹在土中越冬,幼虫一般为6龄。 1984年8月,我们在室内饲养的甘蓝夜蛾幼虫中,发现自然慛病死亡现象,经分离鉴定是被甘蓝夜蛾核型多角体病毒以下简称MbNpV侵染所致。对该病毒多角体的观察和初步研究国内虽有报道(1)(2),但为搞清新疆昆虫病毒资源,了解MbNPV进行生物防治的可能性,我们对该病毒的形态和毒力等进行了研究。现将结果报告如下:
The cabbage bollworm (Mamdstra bressicae L.) is an important pest of sugar beet in Shihezi reclamation area, which seriously affects the sugar content of sugar beet. In addition to endanger the sugar beet, but also to damage cabbage cruciferous vegetables and grasses, legumes, solanaceae and other crops. In the Shihezi area occurs three generations a year, pupa in the soil overwinter, larvae generally 6 years old. In August of 1984, we found the death of natural ricketts in the cabbage armyworm larvae indoors, which was identified by the isolation and identification of MbNpV. The virus polyhedrosis observation and preliminary study although the domestic (1) (2), but to find out Xinjiang insect virus resources, to understand the possibility of biological control of MbNPV, we have the virus morphology and virulence Study. The results reported below: