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田间试验结果表明 :2 0 %克无踪水剂、2 0 %百草枯水剂、10 %草甘膦水剂在茶园行间定向喷雾 ,可有效防除茶园马唐、狗尾草、狗牙根、小飞蓬、苦荬菜、碎米莎草等杂草 ,施药后 3 0天对各类杂草总草株防效、鲜重防效 ,2 0 %克无踪水剂 3 75 0ml/hm2 、2 0 %百草枯水剂 3 75 0ml/hm2 均达 96%以上 ,10 %草甘膦水剂 16875ml/hm2 达 93 %以上。克无踪、百草枯施药后 2小时杂草叶片即开始失绿、枯萎 ,施药 2 4小时后大部分杂草干枯死亡 ;草甘膦施药后 4～ 7天开始出现症状 ,施药后 15天杂草基本枯死。综合考虑除草效果、施药成本等因素 ,防除马唐、狗尾草、小飞蓬、碎米莎草等一年生杂草 ,用 2 0 %百草枯水剂 2 2 5 0ml/hm2 或 10 %草甘膦水剂 112 5 0～ 16875ml/hm2 ;防除辣蓼及多年生杂草狗牙根、苦荬菜用 2 0 %克无踪水剂 3 75 0ml/hm2 或2 0 %百草枯水剂 3 75 0ml/hm2 或 10 %草甘膦水剂 16875～ 2 2 5 0 0ml/hm2 。
The results of field experiments showed that 20% of trace-free tracers, 20% of paraquat and 10% of glyphosate were sprayed in the tea garden in a directional manner, which could effectively prevent Cunninghamia lanceolata, Setaria viridis, Bermudagrass, , Bitter gourd dish, broken beech and other weeds, control of all kinds of weeds on the 30 days after application, the fresh weight control effect, 20% of the no tracking agent 3 75 0ml / hm2, 2 0% paraquat water 3 75 0ml / hm2 reached more than 96%, 10% glyphosate 16875ml / hm2 of more than 93%. No trace, paraquat 2 hours after application of weed leaves that began to lose its green, withered, 2-4 days after the application of most of the weeds dry dead; glyphosate 4 to 7 days after the onset of symptoms, application After 15 days weeds basically dead. Considering the herbicidal effect and the cost of pesticides, the annual weeds of Crabgrass, Setaria viridis, Spearmint, and Beech weeds were treated with 20% paraquat or 2% glyphosate 10% Agent 112 5 0 ~ 16875ml / hm2; control Polygonum capitatum and perennial weed bermudagrass, Sophora japonica with 20% grams of traceless agent 3 75 0ml / hm2 or 20% paraquat water 3 75 0ml / hm2 or 10% glyphosate 16875 ~ 2250 0ml / hm2.