1987年5月,在长沙市郊东岸乡杉木村3亩多柑枯苗圃地发生了柑桔苗疫病。后来在本院农场及附近的一些苗圃调查,亦有不同程度发生。鉴于柑桔苗疫病过去很少有人研究,笔者对此病进行了初步的观察与药效试验。现将结果报告如下。 一、发病情况及症状 5月14日在苗圃发现中心病株,病害蔓延极其 In May 1987, an orange seedling disease occurred in more than 3 mu of citrus nursery in the cedar village of East Coast, in the suburbs of Changsha. Later in our hospital farm and some nurseries near the survey, also have varying degrees of occurrence. In view of citrus mildew disease in the past few people research, the author conducted a preliminary observation of the disease and efficacy test. The results reported below. First, the incidence and symptoms May 14 in the nursery found diseased plants, disease spread extremely