【摘 要】
：
Black-spot is a new disease of bagged apple, which damages the quality of apples greatly.Trichothecium roseum and Alternaria spp.were found to be the main pathogens of black-spot disease on bagged app
【机 构】
：
College of Crop Protection and Agronomy, Qingdao Agricultural University;Key Lab of Integrated Crop
【出 处】
：
中国植物病理学会2014年学术年会
论文部分内容阅读
Black-spot is a new disease of bagged apple, which damages the quality of apples greatly.Trichothecium roseum and Alternaria spp.were found to be the main pathogens of black-spot disease on bagged apple and primarily infection were from remains of flowers.Effects of temperature and relative humidity on colonization and sporulation of three pathogens, i.e.T.roseum, A.alternate and A.tenuissima,were tested by inoculating conidia on dry flowers of Malus micromalus.The three kinds of pathogens produced conidia on the flowers among the temperature between 10 ~35℃ when the humidity above 85%.The quantity of conidia produced by T.roseum on flowers were increased with incubation temperature when the temperature lower than 25 ℃ and decreased with temperature when the temperature higher than 25 ℃.Sporulation of A.tenuissima showed the same trend with T.roseum.A.alternate produced large number of conidia at the temperature 15 ~30℃ when the relative humidity above 85%.The results indicated that temperature during the apple growing seasons wasnt the limit factor for the pathogen sporulation on remain of flowers and the main restrict factor was humidity.The continuous raining, which led to high humidity in fruit bags, might be main factor leading to the epidemic of black spot.
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