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贵州油茶叶肿病发生具有明显的季节性,通常在早春2月即开始发病,3～4月最盛,至5月底结束。发病表现为以下几个特点:其一,发病普遍,发病率较高,对油茶产量有较大影响;其二,发病形态与油茶树龄密切相关。树龄8年以上,发病形态主要以“茶桃”最为多见,即病原菌以侵染花芽、幼果为主,发病株的分布呈聚集性分布。树龄1～8年,发病形态主要以“茶苞”为主,即病原菌以侵染叶芽、嫩叶为主,特别是油茶伐桩1～3年萌生枝及油茶林下的实生苗发病最重,发病株呈随机分布;其三,在树龄8年以上油茶植株上,两种发病状态(茶桃、茶苞)同时出现的情况较为少见。
Guizhou camellia edema disease has obvious seasonal, usually in early spring onset in February, the peak from March to April, to the end of May. The incidence of the performance of the following characteristics: First, the prevalence of the disease, the higher the incidence of tea yield have a greater impact; Second, the incidence of the disease is closely related with the age of tea. Tree age more than 8 years, the main morphological appearance “tea peach ” is the most common, that is, the pathogen to infect flower buds, young fruit-based, the incidence of the distribution of the disease was clustered distribution. Tree age of 1 to 8 years, the main form of disease to “tea bud ” mainly that the pathogen to invade the leaf buds, young leaves, especially the stalks of the branch of Camellia oleifera 1 to 3 years and seedlings under the Camellia oleifera seedlings disease The heaviest, the incidence of the plant were randomly distributed; Third, in the oil-tea plant more than 8 years of age, the two disease states (tea, tea bud) appear at the same time more rare.