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目前国内应用于玉米田的化学除草剂多为土壤封闭药剂,而土壤封闭药剂除在一定条件下应用良好外,又有着一定的局限性,如:施药期已有部分杂草出土而难以防除;施药期天气干旱而影响药效发挥;玉米带茬播种田间麦秸麦糠影响药液吸收;夏收农忙而错过土壤封闭药剂的使用时期等。这就大大限定了农民朋友的用药。为了方便农民,拓宽农民朋友的用药时限和用药品种,更好地推进国内玉米田化除事业的发展,使农民朋友能够适时适地的自由选择用药品种,由原来的被动式用药变为主动式用药,河北宣化农药有限公司2001年在华北玉米田化除市场向广大农
At present, the chemical herbicides used in corn field are mostly soil-enclosed medicaments, while the soil-enclosed medicaments have certain limitations except that they are used under certain conditions, for example, some weeds have been unearthed during the period of application and are difficult to control ; During the application period, the weather is arid and affects the efficacy; the corn stubble wheat straw in the sowing field affects the chemical liquid absorption; the summer harvest is busy and missed the use period of the soil closed medicament and the like. This greatly limits the medication of peasant friends. In order to facilitate the peasants, broaden the time limit and medication varieties of peasants and friends to better promote the development of domestic corn field addition, so that peasants and friends can freely and appropriately select the varieties of medicines from the passive drugs to the active drugs , Hebei Xuanhua Pesticide Co., Ltd. in 2001 in North China corn market in addition to the vast number of farmers