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苹果炭疽病是我县苹果的主要病害,为害严重时可使苹果减产五成以上。我站苹果历年均发生此病,但由于连年采取综合防治措施,病果率逐年下降。金帅、红玉和国光的病果率分别由1978年的35.8％、40.7％和61.9％,降到1981年的1％以下。现将苹果炭疽病的发生情况及防治方法介绍如下。 一、发病情况。苹果炭疽病病菌以菌丝在粗翘皮、僵果、果台、病虫枝、干枯枝、破伤枝和枯桩等处越冬,翌年3月产生粉红色的分生孢子。分生孢子借雨水淋洗传播,从果实的日灼处或机械伤口处侵入,或直接穿透果皮侵染果实使之发病。苹果炭疽病发病的早晚及严重程度取决于温度和降雨量,其
Apple anthracnose is the main disease of apple in our county, causing serious damage to more than 50% of the apple. I stand Apple over the years have occurred in the disease, but due to year after year to take comprehensive prevention and treatment measures, disease rate decreased year by year. The prevalence rates of Jinshuai, Hongyu and Guoguang decreased from 35.8%, 40.7% and 61.9% respectively in 1978 to less than 1% in 1981. The occurrence of apple anthracnose and prevention methods are as follows. First, the incidence. Apple anthracnose pathogen mycelium in the thick Alice skin, stiff fruit, fruit Taiwan, pest branches, dry branches, broken branches and dead pile at the winter, the next year in March to produce pink conidia. Conidia leaching by rain spread, from the sun on the fruit or mechanical wound invasion, or directly penetrate the peel infected fruit so that the disease. The incidence and severity of apple anthracnose depends on temperature and rainfall