板栗是我国的一种重要经济林木，由于近十年来大面积的集中连片的纯林经营，使其原有的生境发生变化。加之一些引进板栗品种的抗逆性差，使得各种病虫害相继发生，特别是枝干病虫的危害，造成板栗生长不良，减产，甚至植株死亡，给板栗生产造成了极其严重的损失。我们从１９９ Chestnut is an important economic forest in our country. Owing to the large area of ​​contiguous pure forests in the past decade, the original habitats have changed. In addition, the introduction of some varieties of chestnut resistance is poor, making a variety of pests and diseases have occurred, especially the hazards of stems and pests, causing chestnut poor growth, reduced production and even plant death, causing extremely serious losses chestnut production. We from 199