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四、及时防治病虫害。1.白纹羽病。被害麻根有灰褐色斑点,叶片变黄绿色而枯死(渍水田及阴湿田易得此病)。防治上要排除渍水,挖去病株,并用1:50的福尔马林药液消毒麻地,过1个月再补种。2.苎麻炭瘟病。被害叶片有圆形灰色小点,病斑逐渐增大,周围黑褐色,茎部病斑初呈圆形后变纺锤形,中央灰色,周围褐色。防治方法:除增施饵肥外,可喷1:2:100的波尔多液,或用多菌灵加水喷雾并撒施石灰,严禁施用不腐熟的人畜粪便。
Fourth, timely prevention and control of pests and diseases. White feather disease Hemp roots have brown spots, the leaves turn yellowish green and dead (waterlogged paddy field and easy access to the disease). Prevention should be ruled out waterlogging, digging diseased strains, and disinfect marsh with 1:50 formalin solution over a month and then replanted. Ramie charcoal Harm leaves have a round gray dots, lesion gradually increased, dark brown around the stem lesions initially round after spindle, central gray, brown around. Prevention and treatment methods: In addition to increasing bait, you can spray 1: 2: 100 Bordeaux mixture, or carbendazim water spray and lime, non-decomposed manure is strictly prohibited.