摘要
本文在连续 3年 (1 993～ 1 995年 )大量调查的基础上 ,研究了宁夏新建二代林网主要造林树种的主要害虫种群数量消长动态和发生规律。结果表明 :新建林网中具有潜在危险性的主要害虫为 :光肩星天牛 (Anoplophora glabripennis Motsch.)、木蠹蛾 (Cossuscossus orientalis Gaede &H olcocerus vicarius(Walker) )、枝梢害虫 (槐花球蚧 Eulecaniumkuwanai (Kanda) .&扁平球坚蚧 Parthenolecanium orientalis(Bouch) )。光肩星天牛种群呈下降趋势 ;木蠹蛾种群为上升趋势 ;槐花球蚧种群虽有下降趋势 ,但虫口密度依然较高 ;扁平球坚蚧在白蜡纯林中种群有逐年增长的趋势 ,而在混交林内数量变化平中有降。研究发现各害虫在合理的树种混交方式下 ,种群数量变化幅度小 ,危害轻 ,因而认为生产中只有营造合理树种搭配下的混交林才能防止和控制害虫的发生。
Based on the three year's observation on quantity of the newly built second- generation forest nets in Yinbei,Ninxia Hui Autonomous Region,population dynamics and trends of principal pests occurring in the main afforesting tree species of the nets are studied. The pests with potential danger to the nets are longicorn(Anoplophora glabripennis Motsch) , carpenterworm(Cossus cossus orientalis Gaeds.&H olcocerus vicarius Walker) and twig and shoot pests (Eulecanium kuwanai(kanda) &Parthenolecanium orientalis (Bouch) ) .Longi- corn population tends to be decreasing during three years.However,the population of car- penterworm keeps going up;E.kwanai population appears declining,but its density main- tain a certain high level;P.orientalispopulation increases in clonal stand of Fraxinuschinen- sis,whereas keeps smooth and steady or has a slight decrease in mixed stand of F.chinesis. The fluctuations of population dynamics of these pests are relative small and the hurts are al- so slight under the management of rational mixed forest with major tree species.So,it is concluded that rationalization of stand structure is one of the most effective measures to pre- vent and control pests.
出处
《西北林学院学报》
CSCD
北大核心
1997年第A12期27-32,共6页
Journal of Northwest Forestry University
基金
国家"八五"科技攻关项目! 85 - 0 18- 0 3- 0 4专题的部分内容
关键词
宁夏
蛀虫害虫
枝梢害虫
种群动态
二代林网
Ninxia Hui Autonomous Region
second- generation forest net
borers
twig and shoot pests
population dynamics.
