靖远松叶蜂生物学特性及发生因素分析

Analysis on Biology Character and Occurrence Factors of Diprion jingyuanensis

在靖远县哈思山自然保护区对靖远松叶蜂的生物学特性及影响其发生、发展的环境因素进行了观察研究。结果表明:该虫在靖远县哈思山林区主要危害油松,1年发生1代,以茧内预蛹幼虫在枯枝落叶层下、杂草基部或其它地被物下越冬,少量预蛹幼虫在树枝上结茧越冬。靖远松叶蜂的发生与林分因子、地形地势关系密切,发生程度一般表现为疏林重于密林,纯林重于混交林,长势弱的林分重于长势好的林分,阳坡重于阴坡。

The observation and research on biology character and environment factors of occurrence and development Diprion jingyuanensis in Hasishan Nature Reserve of Jingyuan country. The results showed： Diprion jingyuanensis caused great damage on Pinus tabulaeformis in Hasishan Nature Reserve of Jingyuan country, it has 1 generation per year and overwinters as young under fallen leaves, weeds or others, few young overwinters on the tree branch. The oc-currence of Diprion jingyuanensis has close relationship with stand factor and local topography, the infestation of Diprion jingyuanensis was more serious in sparse stands, pure stands, stands with a feeble growth, and sunny-slope than in dense stands, mixtures stands and with a good growth stands, shady-slope.