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1985年3月我区“中澳技术合作计划东门桉树林项目”的近百亩桉树苗发生一种较严重的病害,现定名为桉苗灰霉病。此病在国内尚无报道,现就本病的发病情况、病苗症状、病原鉴定、发病因素等简介如下。一、发病情况据调查扶绥县东门林场,此病过去曾零星发生,但未造成经济损失,今年2月开始发生,3月上旬普遍发病,3月下旬为发病高峰,4月下旬病害基本停止扩展。苗圃新植的6个桉树品种都发病。3月下旬现场调查结果,受害最严重的是尾叶桉(Eucaly-ptus urophylla),发病率高达85%,成畦
In March 1985, nearly 100 mu of eucalyptus seedlings in the “East China Eucalyptus Forest Project of Sino-Australian Technical Cooperation Program” in our district suffered a more serious disease and is now named as eucalyptus and gray mold disease. The disease is not reported in the country, is the incidence of the disease, the symptoms of disease, identification of pathogens, the incidence of factors such as the following. First, the incidence According to the investigation Fusui Dongmen forest farm, the disease had sporadic occurred in the past, but did not cause economic losses, began in February this year, the general incidence in early March, the peak incidence in late March, the basic disease in late April Stop expanding New nursery plant 6 eucalyptus varieties are sick. In late March field survey results, the most seriously affected is Eucalyptus urophylla (Eucalyptus urophylla), the incidence rate as high as 85%