北京房山区惠南庄村有果园530亩,全国实行专业化管理。人均管理果园面积12.5亩。果园杂草种类:马唐、苍耳、律草、田旋花、蓟、刺儿草等10余种。1989年进行化学除草试验。选用化学除草剂为:克芜踪(20%)、草甘膦(10%)、拿捕净(20%),每亩用量分别为:200 g、 400 g、 100 g,加水 2 Beijing Fangshan District Huinan Zhuangcun 530 acres of orchards, the implementation of specialized management. Per capita management orchard area of ​​12.5 acres. Orchard types of weeds: Crab, Xanthium, lawn grass, field Convolvulaceae, thistle, thorns and other more than 10 species. 1989 chemical weeding test. The chemical herbicides were as follows: Kudou trace (20%), glyphosate (10%), catching net (20%), the dosage per mu was 200 g, 400 g, 100 g,