枣叶壁虱又称枣叶锈螨、枣瘿螨,俗称灰叶病,是危害沧州小枣的主要害虫之一。自1990年开始,我们对该虫进行观察,现将其发生规律及防治技术介绍如下。 一、危害症状 以成虫、若虫危害叶片、花、果实、嫩芽以及新梢。叶片受危害后基部和沿叶脉部分,先呈现灰白色,发亮,后扩展至全叶,叶片加厚变脆,沿叶缘向叶面卷曲,后期叶绿焦枯,引发大量落叶,严重时造成二次萌芽。花蕾受害后变褐色,并干枯脱落。幼果受害后,发育不良,变成淡黄色而脱落,成果果顶 Jujube leaf tips, also known as jujube leaf rust mite, jujube scabies, commonly known as gray leaf disease, is one of the major pests harm Cangzhou jujube. Since 1990, we have observed this pest and now we will introduce the rules of its occurrence and its prevention and treatment technology as follows. First, the risk of symptoms to adults, nymphs hazards leaves, flowers, fruits, shoots and shoots. Leaf damage by the base and along the veins, showing gray, shiny, and then extended to the whole leaf, leaf thickened brittle along the leaf edge of the curly leaves, the late leaf green coke dry, causing a large number of leaves, resulting in serious two Time sprout. After the buds turn brown, and dry off. Young fruit victims, dysplasia, pale yellow and fall off, the results of the top fruit