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1988～1990年,从海南和湛江地区发生柑桔脚腐病的11个柑桔园采集了大量的病组织和病株基部的土壤样品,经分离共获得48个疫霉分离菌,根据孢子囊形态、脱落性、卵孢子产生、最高生长温度和淀粉利用能力等将其鉴定为寄生疫霉(Phytophthora parasitica Dast)柑桔褐腐疫霉(P.citrophthora R.E.& E.H.Smith)和辣椒疫霉(P.capsici Leonian)。这三种疫霉均是柑桔树的致病菌,其中寄生疫霉和柑桔褐腐疫霉的出菌率高,认为是这两个地区柑桔脚腐病的主要致病菌,而辣椒疫霉在中国柑桔园是首次发现。交配型测定结果以寄生疫霉的A~1,交配型占绝对优势。
From 1988 to 1990, a large number of soil samples were collected from 11 citrus orchards in citrus foot rot in Hainan and Zhanjiang. 48 soil isolates were obtained after isolation, It was identified as Phytophthora parasitica Dast Citrobacter pCitrophthora RE & EHSmith and Phytophthora capsici (P (superscript +)) by morphological, exfoliative, oospore production, maximum growth temperature and starch utilization ability, .capsici Leonian). These three kinds of Phytophthora infestans are the pathogenic bacteria of citrus trees, of which Phytophthora infestans and Phytophthora capsici have a high germ-killing rate and are considered as the main pathogens of citrus foot rot in these two regions Phytophthora capsici was first discovered in China Citrus Orchard. Mating type test results to parasitic Phytophthora A ~ 1, mating type accounted for absolute advantage.