喷克防治苹果主要病害应用技术

Penncozeb Used To Control Apple Diseases

喷克（ｍａｎｃｏｚｅｂ）８０％可湿性粉剂６００倍、８００倍、１０００倍室内对苹果轮纹病（Ｐｈｙｓａｌｏｓｐｏｒａｐｉｒｉｃｏｌａ）抑菌效果均达１００％，６００倍、８００倍对苹果斑点落叶病菌（Ａｌｔｅｒｎａｒｉａｍａｌｉ）、炭疽病菌（Ｇｌｏｍｅｒｅｌａｃｉｎｇｕｌａｔａ）亦具显著的抑制效果。人工接菌条件下，８００倍液防治苹果斑点落叶病的实际保护期为１０～１２ｄ，防治苹果轮纹病的有效保护期为８～１０ｄ。田间药效试验示范表明：喷克８０％可湿性粉剂与波尔多液交替使用，对苹果轮纹病、炭疽病和斑点落叶病具有显著的兼治作用，推荐剂量为８００倍液，施药适期为苹果幼果期（谢花后～６月初，连续喷施３次）和着色期（８月中旬～９月中旬，连喷２次）。

The Fungistic efficacy of Penncozeb 80%WP at 600,800 and 1000 fold to physalospora piricola Nose was up to 100%,and at 600 or 800 fold to Alternaria mali Roberts and Glomerella cingulata were remarkable in the lab test. Under artificial inoculation of field ,Pennrcozed 80%WP at 800 fold could controlled leaf spot of apple and ring rot of apple,the valid peird were up to 10～12d and 8～10d repectively. Penncozeb 80%WP and Bordeaux mixture could be used alternatively to control three apple diseases, which was proved notably in the field trial.It is recommended that Penncozeb 80% WP at 800 fold will be used three times in the young fruit period (after flower drop to early June) and two times in color-touched period (mid-August to mid-September).