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禾大壮是美国施多福公司生产的内吸选择性水田除草剂。主要防除水田稗草、牛毛草等,尤其对稻草特效,对4～5叶期的高令稻草也有较好地效果。禾大壮施于水田中可在土壤表层形成含药毒土层,杂草的初生根及芽鞘从水中或土壤中吸收后,破坏了分生组织细胞的形成,以致新生叶片不能生长而死亡。禾大壮单位面积施用量与气温、杂草发生的时期有密切关系,一般南方气温较高地区施用量较低,垧施96%禾大壮约1.5升左右,北方气温偏低地区,禾大壮的施用量较高,垧施96%禾
Wo Da Zhuang is the United States Shi Duo Fu production of selective absorption of paddy field herbicides. Main control paddy field barnyard grass, ox hair grass, etc., especially for straw special effects, 4 to 5-leaf period of high make straw also have good results. Wo large strong in the paddy field can be formed in the soil surface layer containing toxic drugs, weeds, primary roots and coleoptile absorbed from the water or soil, destroyed the formation of meristematic cells, so that new leaves can not grow and die . Wo Dazhuang unit area application rate and the temperature, the occurrence of weeds are closely related to the general high temperatures in the southern region lower application rate, Shi Shi Shi 96% Wo about 1.5 liters strong, the northern temperature is low, Wo Strong application rate, Shi Shi Shi 96% Wo