金帅苹果是易锈品种,泰安地区常因果锈的发生而影响出口和销售。一般年份果锈率在20%左右,严重的年份可达40-50%。对果锈的发生原因。国外有药害,霜害、病害、遗传等说法,据我们在生产中的观察和体会是春雨来的早,气温低的年份发锈重;六月上旬喷打波尔多液,因铜离子的刺激而致? Golden handsome apple is a rust-prone varieties, often due to the occurrence of rust in Taian region and affect the export and sales. Fruit rust rate of about 20% in general years, severe years up to 40-50%. Causes of fruit rust. According to our observation and experience in production, the spring rain comes early and the temperature is low. In the early part of the year, Bordeaux mixture is sprayed. Due to the stimulation of copper ions and Caused?