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夏玉米播种正处高温、多湿的雨季,草苗共生,管理不及时容易形成草荒。草害对夏玉米危害很大,轻者减产10％以上,重者减产60％以上,甚至无收成。 针对夏玉米除草难,天津市植物保护研究所高级农艺师申日升从80年代中期从事除草剂研究工作。先后收集了国内外除草七十余个品种,在数百个配方中,经过室内生测、盆栽、田间小区试验、大田示范,终于研究出50％丹·乙乳油除草剂。
Summer corn sowing is hot, wet rainy season, symbiosis, management is not easy to form a grassland shortage. Grass damage on summer corn is very harmful, light output reduction of more than 10%, heavy output reduction of more than 60%, or even no harvest. Weeding hard summer corn, Tianjin Institute of Plant Protection senior agronomist Shen Risheng from the mid-80s engaged in herbicide research. Has collected more than 70 varieties of weeds at home and abroad, in hundreds of formulations, after indoor bioassay, potted plants, field plot test, field demonstration, and finally developed a 50% Dan B. EC cream herbicide.