甘薯瘟是甘薯的毁灭性病害,其主要症状是叶片明显萎垂,病株基部呈黄褐色水渍状,后期茎叶枯萎变黑,最后全株枯死。横切病薯,可见褐色点状或片状病斑,薯块发臭,不能食用。据了解,甘薯瘟最早在广东省发现,近年来在浙江省平阳县等地迅速蔓延,发病面积达四万多亩。一九七一年,我县沙埕公社双华大队与平阳县马站公社插花的三十亩农地受传染发病,一九七二年六亩继续发病。沙埕公社南镇大队下奥里小队和桐山公社贯岭、分关两大队也有发病,调查证实是由平阳县马站、桥墩的病苗带入所致。一九七二年九月我们在贯岭大队召开消灭甘薯瘟现场会,经调查落实,全县有六个公社二十五个大队发病,一般损失百分之三十至四十,重者绝收。 Sweet potato plague is a devastating disease of sweet potato, its main symptom is the obvious wilt leaves, the diseased plant base was brown water stains, the late stem wilt darkens, and finally the whole plant died. Potato cross-cutting, showing brown spots or flaky spots, tubers smelly, can not eat. It is understood that sweet potato plague was first found in Guangdong Province, in recent years in Zhejiang Province Pingyang County and other places spread rapidly, the incidence of more than 40,000 acres. In 1971, thirty-five mu of farmland planted with flowers in Shuanghua, Shatang commune and Pingyang County horse station commune was infected. In 1972, six mu of disease continued to develop. Shacheng commune South Town Brigade under the Oliver team and Tongshan commune consistent Ridge, sub-off two brigades also have the incidence, the survey confirmed that by the Pingyang County horse pier, the pier pierced the disease caused by the vaccine. In September 1972, we organized a spot meeting on eliminating sweet potato plague in the Geling Ridge Brigade. After investigations were carried out, there were 25 commune commits in six communes in the county, with a general loss of 30% to 40% .