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桑青枯病是一种新的、毁灭性的桑树细菌性病害。目前只在我国广东省有发生的报导。1973年此病首先在广东省顺德县发现,发病面积只有几亩。近年来迅速扩展蔓延,在广东省桑区几乎都有所发生,有的桑地第一年发病率只有0.7％,但到第二年发展到46％。据广东省1978年普查结果,全省普查面积十八万二千六百一十亩(占全省桑地总面积的97.3％)中,发病面积达一万八千三百一十点六亩,占普查面积的10.07％。我省
Mulberry leaf wilt is a new, devastating mulberry bacterial disease. At present, there have been reports in Guangdong Province of our country. In 1973, the disease was first found in Shunde County, Guangdong Province, and the disease area was only a few mu. In recent years, the spread of rapid expansion has almost always occurred in the mulberry fields in Guangdong Province. In some places, the incidence of mulberry fields in the first year was only 0.7%, but it was 46% in the second year. According to the results of the census conducted by the Guangdong Province in 1978, the census area of the province was 182,600 mu (97.3% of the total area of mulberry fields in the province) with an incidence of 18,310.6 mu , Accounting for 10.07% of the census area. My province