黄缘阿扁叶蜂生物学特性及防治方法的研究

黄缘阿扁叶蜂Acantholyda flavomarginata Maa是一种严重危害云南松针叶的害虫,1994年首次在越西县云南松林区发生。通过1997年至2000年长期野外定点观察、室内饲养和防治试验,结果表明黄缘阿扁叶蜂的生物学特性为在该地区一年发生一代,以老熟幼虫入土作土室而以预蛹越冬。翌年4月初开始活动,5月中旬为产卵盛期,5月中旬幼虫孵出,幼虫5-7龄,6月下旬幼虫开始下树,7月下旬全部下树越冬。其相应的防治措施为卫生伐、人工物理防治、喷施化学药剂。特别是当幼虫处在2-3龄期,是化防最佳时期。采用杀虫双、灭扫利等杀虫率达90％以上。

Bionomics of Acantholyda Flavomarginata Maa. and Preventive Approaches

Acantholyda flavomarginata Mao. is one of the worst pests which is severely harmful to forest of Pinus yunnanensis Sieb. et Zucc in Yuexi County of Liangshan State, Sichuan Province, and was found in 1994 for the first time. Its bionomics characteristics are revealed by the means of observations at given locations in the field, feeding and experiments in the lab from 1997 to 2000. Acantholyda fiavomarginata Maa. propagates one generation per year in this county, and its adult larva digs earth chamber underground then comes through a whole winter in the form of pupa. At the beginning of April in the next year it comes into its new biological behavior phase, oviposits in the middle of May while the larva hatches and lives 5-7ages. The larva departs from the tree in the end of June and finishes its preparation for hibernation at the end of July. Aims at the extensive forest distribution of Pinus yunnanensis Sieb. et Zucc in Yuexi County and the biological characteristics of the pest mentioned above, the control measures are sanitation disafforestation,manual protections, and spraying insecticide. An especial methodology is also given out for killing the larvaby chemical protection during its 2-3 ages when it has a weak ability to eat and accommodate. Someinsecticides have a good effect with the 90% death rate of the pest, such as Dimehypo, Fenpropathrin etc.