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《Journal of Northwest Forestry University》 2017-05
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Geographical Distribution and Damage Degree of Pinus armandii and P.yunnanensis in Xundian County

MA Yong;WANG Hua;DOU Bao-kun;WU Huai-li;Forest Resources Management Station of Kunming;Kunming University;  
In order to improve the ability of pest forecast and to provide scientific basis for the prevention and control of forest pests,the geographical distribution and damage extents of Pinus armandii and P.yunnanensis occurring in Xundian County of Yunnan Province,China were surveyed through the methods of route survey,trace identification and sample plot investigation.The investigation results have practical value in economic production and life.The results showed that among the 12 towns in Xundian County,pests of P.armandii were found in 9towns and not found in 3towns,the main forest pests were Hylobitelus xiaoi,Dioryctria splendidella,Pissodes punctatus,Pineus armandicola.The H.xiaoi was more serious among the four main forest pests which fed on the roots and cadre connection part of the P.armandii,the vertical distribution ranged between 1 923 mand 2 249 m,the rate of damaged plants ranged from 1%-87%.Pests of P.yunnanensis have were found in 11 towns and not found in 1town,the main forest pests were Tomicus yunnanensis,Cephalica chuxiongnica,Monochamus alternatus,Dendrolimus houi.The T.yunnanensis was more serious among the four main forest pests which fed on the cadre and tip parts of the P.yunnanensis,the vertical distribution ranged between 1 909 mand 2 350 m,the rate of damaged plants ranged from 1%-43%,the mortality rate was between 1%-17%.
【CateGory Index】: S763.303
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