梨锈病是梨树上的重要病害,它能引起叶片早枯、脱落,还能危害幼果,造成畸形、早落,严重影响梨树的产量和梨果的品质。现将梨锈病的症状、传播途径及防治方法介绍如下: 1.症状:梨锈病一个显著的特点是在叶子、幼果、果梗和叶柄上出现灰黄色的毛状物。叶子受害时,先在叶正面发生黄色、有光泽的小斑点,数量不 Pear rust is an important disease on pear tree, it can cause leaf withered early, shedding, but also endanger the young fruit, causing deformity, early fall, seriously affecting pear yield and pear quality. Pear rust symptoms, transmission routes and prevention methods are as follows: 1. Symptoms: pear rust is a notable feature in the leaves, young fruit, fruit stems and petioles appear grayish hair. When the leaves are damaged, yellowish, glossy spots appear on the front of the leaves, the number of which is not