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茶萎芽病害是茶场中严重病害之一。据3年来的研究结果认为,每年7～8月高温季节,引起茶树芽梢枯萎,主要是由茶萎芽病菌所致。此病原菌在适温28～30℃时,人工接种2～4天后茶芽出现症状,4～6天茶芽枯萎,14天左右能产生分生孢子器,分生孢子器洋梨形或球形、炭质黑色、直径159.6～292.6微米。分生孢子椭圆形或卵形,初期无色单胞,后为淡橄榄色,中间具一隔膜无收缩,表面平滑无纹,大小为19.2～25.6×9.6～12.8微米。通过对病原菌的分离、培养、接种并对分生孢子器和分生孢子大小、形态特性、生理及寄主范围等的测定,认为此病原菌是壳色单隔孢属(Diplodia Fr.)中的一个种。经查阅国内外文献资料,目前在茶上此病尚未见报道,因此暂定此病原菌为 Diplodia sp.,由此病原菌引起的茶树病害定名为茶萎芽病。此外,根据本病的特性和诱病因子,在防治上还提出了建议。
Tea germination disease is one of the serious diseases in the tea plantation. According to the results of 3 years of research, every year from July to August hot season, causing tea tree shoots withered, mainly caused by the tea germ-wilt disease. The pathogen in the appropriate temperature 28 ~ 30 ℃, 2 to 4 days after artificial inoculation tea bud symptoms, 4 to 6 days withered tea buds, about 14 days can produce conidia, pycnidia or spherical conidia, carbon black , The diameter of 159.6 ~ 292.6 microns. Conidia oval or oval, the initial colorless cells, pale olive after the middle with a diaphragm no contraction, the surface smooth without pattern, the size of 19.2 ~ 25.6 * 9.6 ~ 12.8 microns. The pathogen was considered to be one of the genus Diplodia Fr. by isolating, culturing, inoculating and measuring the size, morphological characteristics, physiology and host range of the conidia and conidia Species. After reviewing the literature at home and abroad, the disease has not yet been reported on the tea, so the tentative pathogen is Diplodia sp., Thus the pathogen-caused tea tree disease called tea germ disease. In addition, according to the characteristics of the disease and the predisposing factor, in the prevention and control also made recommendations.