河西走廊荒漠草地阔胫萤叶甲生活习性及危害

通过对阔胫萤叶甲Pallasiola absinthii害虫生活习性及危害的研究,发现在甘肃河西半荒漠草原上,阔胫萤叶甲1年发生1代,以卵在草丛基部土层中越冬,主要以驴驴蒿Artemisia dalailamae为食,幼虫期是其主要危害期.阔胫萤叶甲的幼虫具有极强的耐饥饿能力,在不食状态下能存活27d之久;水淹3h后仍能复活;不耐冻,在幼虫孵化出土后遇霜冻气候,对其发生蔓延有抑制作用.适于防治阔胫萤叶甲虫害的农药是4.5%氯氰菊脂和水胺硫磷,其最佳施药量为900和750mL/hm2.

Living habit and hazard of Pallasiola absinthii on desert grassland in Hexi Corridor

The living habit and harzard of Pallasiola absinthii was studied on desert grassland in Hexi Corridor.The result indicated that P.absinthii produced one generation each year and survived winter by eggs in grass root soil.They lived on Artemisia dalailamae,caused the main damage at the stage of larva.P.absinthii had very strong hunger tolerance and could survive 27 d without food,and 3 d after flooding.However,they were not cold resistant and frost could inhibit their larva spreading.4.5% cypermethrin and Isocarbophos could be used to control them with 900 and 750 mL/hm2 concentration.