坝上高原白边地老虎生物学特性及防治研究

白边地老虎Euxoa oberthuri Leech是坝上高原地区作物苗期的重要害虫之一。经1984至1986年研究,1年发生1代,以不脱壳的幼虫在卵内越冬。4月底至5月底三龄前幼虫占85％—89.6％,是幼虫防治的关键时期。当地胡麻播种期多在5月上中旬,正值三龄幼虫发生期。采用0.5％(有效成份)甲胺磷拌种。经室内毒力试验,田间小区及大面积防治示范,结果具有90％的杀虫效果及80.2％—91.7％的保苗效果。省工,成本低,操作简便,适宜大面积推广应用。

ON THE BIOLOGY AND CONTROL OF EUXOA OBERTHURI LEECH IN BASHANG HIGHLAND

In 1984-1986,the biology and control of Euxoa oberthuri,one of the important insect pests of flax,naked oat,pea,potato,spring wheat,and kidney bean in seedling stage,in Bashang Highland,northern Hebei Province.The seedling mortalities,and yield damages in different crops and cases,and the critical occurrence period of this insect were investigated.The seed treatment with 0.5% methamidophos,based on a series of experiments and extensive demonstrations treated with several insecticides,was proposed as the principal measure against this insect.