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苹果炭疽病是危害苹果、梨产量和质量的一大病害。1978年8—9月份,我县苹果炭瘟病发生之快,危害之重,是历史上罕见的。据不完全统计,全县有1万亩果园发生炭疽病,病果达1,500万斤,占果品总产量的9%。一、炭疽病的发病规律此病菌在病果、小僵果、干枯的小枝、果台以及潜皮蛾为害的枝条上越冬。次年5月下旬平均气温在18℃以上时,病原菌开始形成分生孢子进行传播。通常在部份枝条的果实上先发病,病果在树上呈伞状向下蔓延。枯枝、病果中的炭疽病菌是主要的初次侵染来源。
Apple anthracnose is a major disease that endangers the yield and quality of apples and pears. From August to September 1978, the occurrence of apple charcoal in our county was rapid and harmful, which is rare in history. According to incomplete statistics, there are 1 million mu of orchards in the county where anthrax occurs and the disease rate reaches 15 million catties, accounting for 9% of the total fruit output. First, the incidence of anthrax The pathogen in the pathogenic bacteria, small stiff fruit, withered twigs, fruit Taiwan and moth damage moth branches on the winter. The following year the average temperature in late May at 18 ℃ above, the pathogen began to form conidia to spread. Usually in some branches of the first onset of disease, fruit trees in the umbrella was spread downward. The dead shoots, the pathogen in the anthrax bacteria is the primary source of primary infection.