华山松出现丛枝与蚜虫及螨危害的关系

Relationship between witches’ broom of armand pine and aphid,mite

对华宁县东山林场、楚雄紫溪山林场及东川 2 0 2林场等地华山松人工纯林的野外调查、标本鉴定及对危害症状进行分析表明 :华山松人工纯林出现大面积丛枝、衰退与华山松球蚜、云南松大蚜及螨的危害有关。受害寄主顶枝生长受到抑制 ,节间缩短 ,生长停滞 ,甚至枯死 ;侧芽生长 ,形似扫帚状 ;球果发育不良 ,结果量、产籽量减少 ;整个植株生长势衰弱。

Using the field investigation on Pinus armandii Franch,collecting and identifying sample of the pathogen and the insect in Huaning,Chuxiong and Dongchuan of Yunnan Province and analyzing injured symptom,the result showed that witches' broom and degradation phenomenon of Pinus armandii plantation was cause by Pineus armandicola Zhang, Cinara piniyunnanensis Zhang and Oligonychus sp..The symptom contained shortening of internode, inactive growth of terminal bud even death,but active growth of lateral bud resulting in witches’ broom;cone hypoplasis and bearing less fruit;reducing the tree growth and vigor.The injured position mainly is the terminal bud on main branch in middle young plantation or on lateral branch in old plantation.