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红薯根腐病又叫烂根病、开花病,是近年来我省新发生的一种毁灭性病害。一九七五年开封地区对9县138个公社普查,其中7个县63个公社18万亩红薯发生根腐病。尉氏县30万亩红薯就有11万亩发生根腐病,7万亩绝收。目前全省各地普遍发生与蔓延。夏薯的根腐病重于春薯。据嵩县九店公社农技站观察,春薯五月七日栽秧,发病始期五月下旬,七月中旬以后危害减轻,危害盛期是六月中旬至七月上旬。红薯根腐病的病源为茄病镰刀菌侵入而引起的病害,其症状苗床期,病薯出苗比健
Sweet potato root rot known as rotten root disease, flowering, is a new devastating disease in our province in recent years. In 1975, a total of 138 communes in 9 counties were surveyed in Kaifeng area. Root blight occurred in 180,000 mu of sweet potato in 63 communes in 7 counties. Weishi County, 300000 acres of sweet potato have 110000 acres of root rot, 70000 acres of crops. Currently widespread and widespread throughout the province. Root rot of sweet potato is heavier than that of sweet potato. According to the Songdian nine shop commune agricultural station observation, sweet potato planted on May 7, the onset of the beginning of late May, mid-July after the harm alleviate the risk peak is mid-June to early July. The root cause of sweet potato root rot disease caused by invader Fusarium solani disease, the symptoms of seedbed stage,