板栗红蜘蛛属蛛形目,叶螨科。在我省长城沿线板栗产区均有发生。其中以迁西县为害较重。此虫为害叶部,吸食汁液,致使树势衰弱,影响栗树生长及果实产量。现将我县板栗红蜘蛛发生情况和防治方法介绍如下:一、发生情况板栗红蜘蛛在我县一年发生5-7代,大部分以卵在1—3年生枝上越冬,其中1年生枝的芽、粗皮、分杈处较多。5月上旬平均气温达12℃以上时开始孵化,以侧脉凹 Chestnut red spider arachnids, spider mites Branch. Chestnut areas along the Great Wall in our province have occurred. Among them, Qianxi County is more serious. This pest damage leaves, smoking juice, resulting in frail weakness, affecting chestnut tree growth and fruit yield. Now my county chestnut spider occurrence and prevention methods are described below: First, the occurrence of chestnut red spider occurred in our county 5-7 generations a year, most of the eggs in the 1-3 year old branches wintering, of which 1 year old branches Buds, bark, bifurcation more. The average temperature in early May reached 12 ℃ above the hatching began to side veins concave