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草蛉是棉蚜、棉铃虫的重要天敌,本文通过1976—1978年试验,记述了叶色草蛉(Chrysopa Phyllochroma Wesmacl)、中华草蛉(C.sinica Tjeder)、大草蛉(C.septempunctata Wesmacl)和丽草蛉(C.formosa Brauer)各虫态的形态特征.室内饲养观察了上述四种草蛉的生活史和主要习性,以及取食棉蚜、棉铃虫卵量.结合田间消长调查,认为四种草铃在我省一年主要发生四代,但成虫寿命和产卵期长,世代重叠现象严重,且系兼性滞育越冬,部分个体可发生四代以上.叶色草蛉是我省麦田、棉田的优势种,其次是中华草蛉.叶色草蛉在棉田内自然蛉量以7月中旬至8月上旬最多,应注意保护和繁殖释放,增加棉田此期蛉量,是减轻和综合防治伏蚜及三代棉铃虫为害的重要措施之一.试验用“鱼籽”代用饲料,制成人工假卵,饲养草蛉幼虫和成虫取得了较好的效果.
Grass 蛉 is an important natural enemy of cotton aphid and cotton bollworm. In this paper, the experiments of 1976-1978 described Chrysopa Phyllochroma Wesmacl, C. sinica Tjeder, C. septempunctata Wesmacl, And C.formosa Brauer were observed in the field.Studies on the life history and main habits of the four species of grassweed, as well as the amount of eggs consumed by cotton aphid and bollworm, Four kinds of weeds mainly occur in our province for four generations a year, but the adult life and spawning period, generation overlap is serious, and part-time diapause overwintering, some individuals can occur more than four generations. Province wheat, cotton, the dominant species, followed by the Chinese grass 叶 .The leaf color grass 蛉 in the cotton field natural 蛉 measured in mid-July to early August up, should pay attention to the protection and reproduction of the release, increase this amount of cotton in the field is to reduce And one of the important measures to prevent and control the aphids and three generations of cotton bollworm.Experimental use of “roe” ’s substitute feed made artificial false eggs, and achieved good effect on larvae and adults.