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70年代以来,苹果斑点落叶病在全国苹果产区普遍发生。1985年以来,作者等在烟台地区进行系统调查和防治研究。该地区自5月下旬至6月初开始发病,7月中、下旬至8月上、中旬达发病高峰。流行时期与发病程度取决于田间菌原量、6—9月份降水。发病高峰期同园调查,红星与青香蕉病叶率分别为91.88％和92.42％,小国光则为35.41％。防治试验表明,10％多氧霉素1000—2000倍液效果均优于波尔多液,但因残效期短,不能控制危害,而与波尔多液交替使用效果明显,增产23.1％。
Since the 1970s, apple spot deciduous disease occurs in the countrywide apple producing areas. Since 1985, the author conducted systematic investigations and prevention and control research in Yantai. The area from the beginning of late May to early June onset, mid-July, late August to August, reached the peak in the middle. Prevalence and incidence depends on the amount of field bacteria, precipitation from June to September. In the same period of peak incidence, the leaf rates of Red Star and Green Banana were 91.88% and 92.42%, respectively, while those of Xiaoguangguang were 35.41%. Control tests showed that the effect of 10% doxorubicin 1000-2000 times was better than that of Bordeaux mixture, but the effect was not obvious because of short residual period. The effect of alternating with Bordeaux mixture was 23.1%.