杏树感染早期落叶病,5月底就开始落叶,6、7月间发展最重,能使全树叶子落光。不仅严重影响树木生长和杏的产量,甚至造成杏树死亡。为此我们对其进行几年的防治试验,取得良好效果,现总结介绍如下,供参考。 一、发病情况 5月中下旬,杏树枝条的下部叶片开始发病,最初只在叶尖和叶边出现不规则的褐色斑 Apricot tree infection early deciduous disease, the end of May began deciduous, the most developed in June and July, can make the whole tree leaves falling light. Not only seriously affect the growth of trees and apricot production, and even cause apricot death. To this end we have carried out several years of its prevention and treatment test, achieved good results, are summarized below, for reference. First, the incidence in late May, apricot branches of the lower leaves began to attack, initially only in the tip and leaf edge irregular brown spots