摘要
柠条绿虎天牛是近年来在宁夏柠条灌丛中大面积暴发的一种钻蛀性害虫，主要以幼虫危害柠条的枝干部。论文调查研究了柠条绿虎天牛的危害特性及种群数量的动态变化。结果表明，幼虫和成虫主要分布在柠条枝干0-100cm范围内，以0～20cm处居多，其数量由基部至顶部逐渐减少。幼虫主要危害4年生以上的柠条植株，以6～8年生受害最重。随着柠条地径的增加，天牛成虫数量逐渐增加，而幼虫数量则呈现先增加再减少的变化趋势。不同时期幼虫数量在枝干上的分布变化较大，幼虫具有转移危害习性，先由基部和顶部向中部转移，随着气温的不断降低，则由顶部不断向基部转移，以0-20cm处的数量最多，可能柠条枝干基部的环境更有利于幼虫的越冬。
Chlorophorus sp. （Coleoptera： Cerambycidae） has been a severe boring pest for Caragana spp, in Ningxia in recent years. Larvae of Chlorophorus sp. primarily damage the roots and branches of Caragana spp.. The authors analyzed damage characteristics and population dynamics of Chlorophorus sp. in this study. The results showed that the larvae and adults of Chlorophorus sp. mainly distributed in the stems at the height of 0-100cm, especially 0-20cm, and their numbers decreased from the base to the top. The larvae mainly damaged the plants of more than 4 years old, especially those in the age of 6-8 years. With the increase of plant diameter, the numbers of adult Chlorophorus sp. increased gradually, but the numbers of larvae increased first and decreased thereafter. The distribution of larvae in different periods changed greatly in the stems. The larvae moved from the base and top to the center, but they would move from the top to the base with gradual decreasing of temperature. The largest numbers of larvae were found in the stems of 0-20 cm, and this might be because the base provided a more suitable environment for overwintering.
出处
《生态科学》
CSCD
2010年第2期127-130,共4页
Ecological Science
基金
北京林业大学“优秀青年教师科技创新计划(BLYX200919)”
“十一五”国家科技支撑计划项目(2006BAD08A1001)
长江学者与创新团队发展计划(PCSIRT0607)资助
关键词
柠条绿虎天牛
柠条
危害特性
种群动态
Chlorophorus sp.
Caragana spp.
damage characteristics
population dynamics
