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５％精克草能乳油是防治稻草等阔叶作物的禾本科杂草的除草剂，１９９８年，我们观察了在低温条件下对油菜田杂草防除效果，现报告如下。试验田基本情况：试验田间杂草以禾本科杂草（三月草）为优势草种，杂草在３～４叶期，其密度为每平方米１０００～２０００株，其次为阔叶
5% Cleopatra EC is a herbicide against gramineous weeds such as straw and other broadleaf crops. In 1998, we observed the weed control effect on rape fields under low temperature conditions and are reported as follows. The basic situation of the experimental field: Weeds in the experimental field with gramineous weeds (March grass) as the dominant species of weeds in the 3 to 4 leaf stage, the density of 1000 to 2000 per square meter, followed by broadleaf