Dendrolimus Punctatus Damage Remote Sensing Monitoring And Inlfuence Factors Analysis

In this paper, it takes Shaxian of Sanming as study area and takes dendrolimus punctatus as studyobject, according to analyze the field hyperspectral data and to establish the stand spectral database baseon the characteristics change of dendrolimus punctatus. On this basis, it selects three indexs that areGVI,Red edge parameters and LAI to monitor the dendrolimus punctatus. And then it uses the decisiontree method to establish the monitoring model of dendrolimus punctatus.In the last, using themathematical methods to analyze the relationship between the occurrence of dendrolimus punctatus andclimatic factors,natural conditions.In order to reveal the general laws of the occurrence of dendrolimuspunctatus.The main conclusions were as fllows:(1)According to measure the spectral values of pinus massoniana in different habitats and differentdegree of pest to establish the stand spectral database base on the characteristics change of dendrolimuspunctatus.In order to reflect the different spectral values of pinus massoniana in different habitats anddifferent degree of pest.(2)Based on the analysis of the different spectral values in different,it select GVI,Red edgeparameters and LAI as the characteristic variables to classify the degree of dendrolimus punctatus. Itsets up the classification rules of the characteristic variables,and then using the classification method ofdecision tree to extract the information of the degree of dendrolimus punctatus.At last,using the objectdata measured by the forecast national center and field survey materials of dendrolimus punctatus in2004to accuracy verify.The overall accuracy of classification result is77.0%.(3) According to the correlation analysis,the correlation coefficients that the occurred area ofdendrolimus punctatus with annual average temperature,average humidity and total annual rainfall arebelow0.3.This shows this three climatic factors are not individually affect the occurrence ofdendrolimus punctatus.By the stepwise regression analysis to analy this three climatic factors and theoccurred area, the correlation coefficients is0.7598. This shows this three climatic factors are combinedeffect the occurrence of dendrolimus punctatus. (4) According to comprehensive analysis of the extent of masson pine pests and naturalenvironmental factors with the methods of DCCA, elevation,slope and topography of small classes havea greater impact the pests occurrence.This is because different altitude and topography can lead to theclimate, soil and vegetation are differences in a very short distance. This is not only affect itsdistribution,and even affect its growth and development.