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水葫芦是一种水生阔叶杂草,繁殖力很强,常满河满湖茂密生长,其株高可达30～80厘米,有的甚至超过100厘米,每亩(1亩=667平方米,下同)鲜重量高达5～10多吨,往往造成河道阻塞,严重影响河道排涝和船舶的航行,成为一大公害。近年来,笔者多次进行除草剂灭除水葫芦的试验。结果表明,除灭河道水葫芦宜在防汛前期的5～6月份日最低气温在15℃以上时进行,对株高在30厘米以下的水葫芦,可选晴天每亩用20%二甲四氯水剂750毫升加皂粉100～200克,或用20%二甲四氯500毫升加10%草甘膦水剂1000毫升加皂
Water hyacinth is a kind of aquatic broadleaf weeds, fertility is very strong, often overgrowth Lake full of growth, the height of up to 30 to 80 cm, and some even more than 100 cm per mu (1 mu = 667 square meters , The same below) fresh weight up to 5 to 10 tons, often resulting in river obstruction, seriously affecting the river drainage and navigation of the ship, become a major public hazard. In recent years, the author repeatedly conducted tests to eliminate water hyacinth herbicide. The results showed that water quenching river water hyacinth should be in the early flood season from May to June when the minimum temperature is above 15 ℃ for plant height below 30 cm water hyacinth, optional sunny 20% 750 ml of liquid agent plus soap powder 100 to 200 grams, or with 20% MCPA 500 ml plus 10% glyphosate 1000 ml soap