台湾乳白蚁对南宁市园林树木的为害及其筑巢规律

在广西南宁市调查台湾乳白蚁Coptotermes formosanus Shiraki对园林绿化树木的危害情况及其筑巢规律。结果表明,在调查的57种树木中,有44种树木受到台湾乳白蚁的侵害,占调查树种的77.19%,树木受害株率13.38%,严重受害株率1.63%。侧柏Thuja arientalis、荫香Cinnamomum burmannii和银桦Grevillea robusta的严重受害率最高,分别为15.85%、13.43%和11.11%。台湾乳白蚁筑巢对树木种类有明显的选择性,可在树心筑巢的树种有16种,隶属于11科14属,其中筑巢率较高的树种为荫香、侧柏、银桦和桂花树Osmanthus fragrans,分别占所调查树木的16.42%、15.85%、11.11%和10.91%;其次为樟树Cinnamonaom camphora、大叶桉Eucalyptus robusta和白千层Melaleuca leucadendta,筑巢率分别为7.98%、5.76%和3.42%。

Damage and nesting of Coptotermes formosanus to park trees in Nanning

A survey was made on the damage of Coptotermes formosanus Shiraki to park trees and its nesting rules in Nanning,Guangxi.The result showed that among the 57 species of surveyed park trees,there were 44 species were damaged by C.formosanus,which make up 77.19%.The damage rate was 13.38%,of which 1.63% were seriously damaged.Among tree species damaged by termites,Thuja arientalis,Cinnamonaom camphora and Grevillea robusta appeared to be the most seriously damaged species,which make up 15.85% 、13.43% and 11.11%,respectively.There were obvious selective to the trees species when C.formosanus choosing the trees for nesting,and the tree heart of 16 species trees were chosen for nesting,which belong to 11 families and 14 genera.The tree species nested seriously by the termite were Cinnamomum burmannii,Thuja arientalis,Grevillea robusta and Osmanthus fragrans which make up 16.62% ;15.85% 、11.11% and 10.91% respectively among the surveyed tree species.Follow by Cinnamonaom camphora,Eucalyptus robusta and Melaleuca leucadendta which make up 7.98% 、5.76% and 3.42%,respectively.