有机磷杀虫剂三唑硫磷(Hostathion)已经英国农业部批准成为防治三点禾蝇[grass and cereal fly(Geomyza)]的第一个农药。三年来,这种蝇对越冬谷物的危害日趋严重。去年赫司特(Hoechst)公司——三唑硫磷的生产公司,推荐用三唑硫磷防治三点禾蝇,这也是第一家提出防治三点禾蝇的公司。三唑硫磷施药量为每公顷1.5升加水200～300升在蝇卵孵化期施药。在通常情况下, Organophosphate insecticide Hostathion has been approved by the UK Department of Agriculture as the first pesticide to control three-point grass and cereal fly (Geomyza). Over the past three years, the flies have been harming the wintering cereals. Last year, Hoechst, a maker of triazophos, recommended the use of triazophos for the control of the three-spot pest, which was the first company to propose a three-point crop control program. Triazophos application rate of 1.5 liters per hectare plus 200 to 300 liters of water in the fly egg incubation period. in normal conditions,