日本松干蚧虫情预报与虫口密度的研究

Studies on Matsucoccus matsumurae forecasting and population density

为揭示日本松干蚧分布规律,预测其发生期,提供虫情预报,在仙人洞自然保护区赤松栎林和赤松林分内,分别设置固定和临时标准地,面积为50 m×50 m,得出各虫期和虫口密度,研究结果表明:采用有效基数法对日本松干蚧越夏代若虫的发生量进行预测预报,预测结果与实际观测结果基本吻合;日本松干蚧的虫口密度随赤松树龄加大而增加,从阳坡到阴坡逐渐加大,与林分的郁闭度和混交林中赤松的比例成正比。

In order to discover the distribution rule of Matsucoccus matsumurae,predicate its occurrence period,and provide pest forecasting,permanent sample plot and temporary sample plot,with the area of 50 m×50 m,were set in Japanese Red Pine-oak forest and Pinus densiflora forest in Xianrendong National Nature Reserve,and the stages and density of pest were detected. The research results indicated that,the occurrence amount of over-summering nymph predicated by efficiency cardinal number method coincided with the observed result. The pest density was increased with the increasing of Pinus densiflora age,and was proportional to forest canopy density and the percentage of Pinus densiflora in mixed forest.