To find out the seasonal epidemic dynamics of walnut anthracnose in Shangdong and the efficacy of countermeasures such as pruning&cleaning and chemical control, systemic investigation and field tests were con-ducted in major walnut production areas in Shandong in 2013 .The results showed that the spread of seasonal wal-nut anthracnose was slow at the initial stage and then got rapid instantly, meeting with the Richards' s model which well describes the seasonal epidemic dynamics of walnut anthracnose.Based on this model, the highest increasing speed of diseased fruit rate was 1.17%/d.Pruning and cleaning in the late fall and early spring were proved as e-conomic and effective countermeasures, since the diseased leaf rate and fruit rate were 52.3%and 58.3%lower, respectively.Applied Bordeaux mixture twice after defoliation and before bud sprouting, the control effect was a-bove 65%.In growing season, when applied appropriately with Carbendazim 50 WP, Thiophanate-methyl 70 WP and Flusilazole 40 EC, the efficacy was above 85%, which controlled the anthracnose efficiently.%为阐明核桃炭疽病在山东省的季节流行规律,明确清园、 药剂防治等措施的防治效果,2013年在山东省核桃主产区进行林间调查取样,开展清园、 休眠期、 生长期药剂防治等田间试验.结果表明,核桃炭疽病在山东省的季节流行动态先缓慢后快速增长,Richards模型能够较好地反映核桃炭疽病时间流行动态.病果率增长最快达到1.17%/d.秋末春初清园处理,园内核桃病叶率、 病果率减少52.3%和58.3%,是减轻炭疽病危害的经济有效措施之一.落叶后以及萌芽前及时喷2次波尔多液,防治效果在65%以上.核桃生长期合理使用多菌灵、甲基托布津、 氟硅唑等化学农药,防治效果在85.0%以上,能够有效控制炭疽病的危害.
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