华山松疱锈病和华山松球蚜复合防治指标研究

A STUDY ON THE COMPOUND CONTROL THRESHOLD OF Pinus armandi BLISTER RUST AND Pineus armandicola

在华山松有害生物生态系统中 ,华山松疱锈病和华山松球蚜往往是同时发生的 ,它们间有着复杂的互作关系 ,如果应用单目标对象的防治指标 ,常常会顾此失彼 ,出现材积损失率超出经济损害水平的危险。为避免这种情况的发生 ,本文就昆明市东川区二百二林场华山松疱锈病和华山松球蚜对华山松的复合危害情况进行了调查研究。结果表明 ,华山松疱锈病危害级代表值和华山松球蚜危害级代表值与华山松材积损失率间有明显的相关关系 ,它们间的这种关系可用多元回归方程表示为 :Y =1 0 .574 +8.1 1 3 2 4X1+7.0 1 964X2 (X1—华山松疱锈病危害级代表值 ,X2 —华山松球蚜危害级代表值 )。并在此基础上 ,考虑了不同的立木生长量、木材价格、防治费用和防治效果 ,进一步建立了华山松华山松疱锈病和华山松球蚜复合防治指标的动态模型8.1 1 3 2 4X1+7.0 1 964X2 =[C/(D×J×E) ]× 1 0 0 -1 0 .574 (C—防治费用 ,D—对照单位面积的材积 ,J—木材价格 ,E—防治效果 )。

The Pinus armandi blister rust and the aphid Pineus armandicola were usually occurred during the same period within the harmful bioecosystem of armand pine forest,and there was conplex relationship between them.So,if the unitary object control threshold was applied under this condition,the outcome would be biased,the danger that the loss ratio of the timber volume exceeded the economical injury level would be occurred. In order to avoid this case,the compound damage of both the disease and the pest was studied on No.220 Forest Farm,Dongchuan District of Kunming City,Yunnan Province.The result showed that the interrelationship of both the representative value of the damage grade of the Pinus armandi blister rust and that of the aphid Pineus armandicola with the loss ratio of the volume was evident,which could be expressed in a regression equation:Y=10.574+8.11324X\-1+7.01964X\-2 X\-1 —the representative value of damage grade of Pinus armandi blister rust, X 2 —the representative value of damage grade of Pineus armandicola \;On the basis of the regression equation,and taking the differences of the timber volume,log price,control cost and control effect into account future,the compound control threshold dynamic model of both the disease and the pest can be formulated as:8.11324X\-1+7.01964X\-2=[C/(D×J×E)]×100-10.574 C —control cost, D —checked volueme, J —log price, E —control effect This model provides the theoretical basis for the integrated control of the diseses and pests of the armand pine.