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研究证明,柑桔脚腐病是疫霉属(Phyto Phthora)寄生疫霉P.Parasitica、柑桔褐腐疫霉P.Citro Phthora、棕榈疫霉P.Palmivora、恶疫霉P.Cactorum、甜瓜疫霉P.melonis等为害所致,其中以寄生疫霉所占比例最大。本文以寄生疫霉为代表种,研究了疫霉菌的侵染途径和潜育期,以及该病在田间的发病规律和发病诱因。病菌靠雨水传播,从树对体伤口及自然乱口侵入,潜育期2～6天。发病与地温高低和雨量多少呈正相关,发病轻重与树龄、品种、繁殖方式、土壤、地势等多种因素密切相关。
Studies have shown that citrus foot rot is Phyto Phthora parasitic Phytophthora parasitica P. Parasitica citrus Phytophthora citricola P.Citro Phthora, P.Pdmivora, P.Pactorum, melon epidemic P. melonis and other damage caused, of which parasitic Phytophthora proportion accounted for the largest. In this paper, parasitic Phytophthora as the representative species, studied Phytophthora infestation and incubation period, as well as the incidence of disease in the field and the incidence of incentives. Pathogen by rain spread from the body of the tree wounds and natural chaos invade, latent period of 2 to 6 days. The incidence and the level of ground temperature and the amount of rainfall was positively correlated with the incidence of severity and age, variety, reproductive methods, soil, terrain and other factors are closely related.