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辽宁省玉米田化学除草的药剂配方多采用杜尔、阿特拉津混剂,或拉索、阿特拉津混剂,在播后苗前做土壤封闭处理.这个配方和施药时机的除草效果受当年气候影响很大,遇到初夏干旱年份除草不理想,如1987、1988年连续两年初夏干旱.玉米田有1/3左右的面积除草效果不好.致使再次铲趟或重施除草剂,如何解决“旱降效”问题呢?我们做了若干资料分析和大量田间调查及小区试验,提出三点意见1,改变“杜阿”、“拉阿”混剂的施药时机 我省玉米田除草通常采用每亩用杜尔乳油200毫升或拉索乳油100毫升加阿特拉津胶
Chemical formula of chemical herbicide in corn field in Liaoning province use DUR, atrazine compound, or atrazine, atrazine compound, to make soil closed treatment before sowing seedlings .This formula and pesticide timing of pesticide application The effect was greatly influenced by the climate of the year, when we met the drought in early summer weeding was not ideal, such as the summer drought in 1987 and 1988 for two years in a row.About one third of the area of cornfield has a poor weeding effect, resulting in shoveling or re-weeding How do we solve the problem of “drought reduction efficiency”? We made a number of data analysis and a large number of field surveys and community trials, put forward three observations 1, change the “Dua”, “Laa” mixture of pesticides timing of our province Corn weeds are usually used per mu with Dour EC 200 ml or laccolide 100 ml plus atrazine