苹果锈病,也叫赤星病,主要为害叶、幼果和嫩枝,近年来,随着城市园林事业的发展,锈病的中间寄主桧柏大量栽植,致使苹果锈病有逐年加重为害的趋势。据1979年在鞍山“二一九”公园内万株苹果树调查, Apple rust, also known as brown spot disease, the main damage to the leaves, young fruit and twig, in recent years, with the development of urban landscape, the middle host of rust cypress cypress planted in large numbers, resulting in the trend of increasing apple pest infestation. According to a survey of 10,000 apple trees in the “February 19” Park in Anshan in 1979,