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通过两年的系统调查，查明北京地区草坪地杂草有６２种，分属２２科。重要杂草有牛筋草（Ｅｌｅｎｓｉｎｅｉｎｄｉｃａ（Ｌ．）Ｇａｅｒｔｎ）、狗尾草（Ｓｅｔａｒｉｎｖｉｒｉｄｉｓ（Ｌ．）Ｂｅａｕｖ）、马唐（Ｄｉｇｉｔａｒｉａｓａｎｇｕｉｎａｌｉｓ（Ｌ．）Ｓｃｏｐ）和旋覆花（ＩｎｕｌａｊａｐｏｕｉｃａＴｈｕｎｂ）。农得时和草克星４０ｇ／亩用量在草坪播后苗前处理对牛筋草、马唐和一年生双子叶草的防效在８５％以上，不影响草坪的出苗和长势。除草通、丁草胺１５０ｍｌ／亩在草坪地苗后处理对马唐、牛筋草和稗草的防效达９０％，对草坪安全。圃草定８０ｇ／亩对马唐，稗草的防效达９０％，但对牛筋草效果差。恶唑禾草灵６０ｍｌ／亩，快杀稗４０ｇ／亩和８０ｇ／亩在草坪苗后茎叶处理，均可有效地防除马唐、稗草，且恶唑禾草灵对牛筋草有特效。两药剂对草坪安全。２，４－Ｄ丁酯５０ｍｌ／亩，阔叶净１ｇ／亩，苯达松１３５ｍｌ／亩在草坪苗后处理能有效地防除一年生双子叶杂草
Through two years of systematic investigation, it has been found that there are 62 species of lawn grass in Beijing, belonging to 22 families. The important weeds are Elegansine indica (L.) Gaertn, Setarinviridis (L.) Beauv, Digitariasanguinalis (L.) Scop, and Inula japonica Dunburn. Agronomy and grass nemesis 40g / mu amount of seedlings in the lawn sowing after pre-treatment on the tendon grass, crabgrass and annual dicotyledon’s control effect in more than 85%, does not affect the lawn emergence and growth. Weeding through, butachlor 150ml / mu in the lawn seedling post-processing of crabgrass, tendon grass and barnyard grass control effect of 90% of the safety of the lawn. Nursery grass set 80g / mu on Crabgrass, barnyard grass control effect of 90%, but the effect of the tendon poor. Oxazole grass spirits 60ml / mu, fast barnyardgrass 40g / mu and 80g / mu in the lawn seedling stems and leaves treatment, can effectively control Crabgrass, barnyardgrass, and oxazole grass grass on the tendon has a special effect . Two agents on the lawn safety. 2,4-D butyl ester 50ml / acre, broadleaf net 1g / acre, bentazon 135ml / acre after the lawn seedling treatment can effectively control annual dicotyledonous weeds