山楂红蜘蛛俗称火龙,主要危害苹果、梨桃、山楂等果树。近几年来,该虫在我省发生较重,特别是在高温干旱年份以及管理粗放的果园发生相当严重。 一、山楂红蜘蛛的发生规律 山楂红蜘蛛在河北省一年发生6～9代,以受精雌成虫在树干、主枝和侧枝的粗皮缝隙、树权和树干附近的土缝内越冬,发生重的果园,在树下土块、落叶、杂草根及果实的萼洼、梗洼等处都有越冬成虫存在。越冬成虫在果树花芽膨大 Hawthorn spider commonly known as the dragon, the main harm to apples, pears, hawthorn and other fruit trees. In recent years, the pest occurred in our province heavier, especially in high temperature and drought years and the extensive management of the orchard occurred quite serious. First, the occurrence of hawthorn red spider hawthorn spider occurred in Hebei Province, 6 to 9 generations a year to fertilized female adults in the trunk, the main branches and collateral thick skin cracks, tree trunks and near the soil seam winter winters, heavy Of the orchards, in the tree clods, leaves, weeds, roots and fruits of the calyx depression, stems depression and other places have overwintering adult existence. Overwintering adult flower buds inflated in fruit trees