紫胶蚧寄生对久树生长的影响  

Growth of Schleichera oleosa infested by Kerria lacca

作　　者：陈又清[1] 王绍云[1] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,昆明650224

出　　处：《昆虫知识》2006年第4期549-552,共4页Entomological Knowledge

基　　金：科技部农业科技成果转化资金项目(04EFN216700336);国家林业局中试项目([2004]17);国家科技攻关项目(2001BA502B0401)资助。

摘　　要：研究一个世代中紫胶蚧KerrialaccaKerr寄生对久树(Schleicheraoleosa(Lour)Oken)生长产生的影响。结果表明:紫胶蚧寄生对整株寄主植物(久树)的生长有促进作用,被寄生的植株与对照植株之间,树高、地径、胸径和冠幅增长比例相差2%～4%。紫胶蚧寄生对被寄生枝条的生长有抑制作用,被紫胶蚧寄生的枝条长度和枝径的增长小于未被紫胶蚧寄生的枝条,未被紫胶蚧寄生的枝条表面积增加的幅度比被紫胶蚧寄生的枝条的表面积增加幅度大17%。紫胶蚧寄生对枝条和整株植物的生长影响不一样,反应了紫胶蚧和寄主植物在长期的协同进化过程中采取的防御和反防御机制。对于寄主植物而言,被寄生的枝条合成的营养成分有部分被紫胶蚧吸收,生长受到影响,如果被寄生过量,甚至会死亡;而对于整株植物而言,在害虫侵袭下,会出现超补偿行为,生长量超过未被寄生的植株。对于紫胶蚧,寄主植物这种防御行为对种群繁衍有利,其他未被寄生的枝条的超补偿生长,为紫胶蚧后代提供了更广阔的生存空间。研究紫胶蚧寄生对久树生长的影响,为充分利用紫胶蚧种虫和寄主植物资源打下基础。Growth of kusumi （Schleichera oleosa （Lour） Oken） infested by Kerria lacca Kerr was studied. The results showed that K. lacca parasitization could promote its kusumi tree growing. The increase ratio of tree height, stem diameter near ground, breast height diameter and canopy cover was from 2% to 4%. However, branch growth was inhibited by K. lacca. The net increase of branch length and diameter hosted by K. lacca was less than that of control branch, and the net increase of branch surface area was larger than that of control branch by 17%. The different influence on growth of the branch and the whole tree after infestion by K. lacca reflected the defense strategy of the host tree during long time of insect-plant co-evolution. For kusumi tree, some nutrient was absorbed by K. /acca, the growth speed in branch was influenced, if hosted seriously, the branch even died. The whole tree adopted growth compensation behavior, and its growth speed exceeded the none-hosted branch. The defense behavior of K. lacca and host tree benefited population reproduction of K. lacca because ultra-compensation growth of other nonehosted branch offered larger space for their offspring.

关 键 词：紫胶蚧 久树 寄主植物 寄生 生长 

分 类 号：S899.2[农业科学—特种经济动物饲养]