A Method for Detecting the Damage of Apocheima Cinerarius Erschoff based on MODIS Time Series:Case Studies in Bachu Populus Euphratica Forest of Xinjiang Province

In recent years，the damage of Apocheima Cinerarius Erschoff in Xinjiang province has seriously threatened the survival and green barrier function of natural Populus euphratica.Due to the large coverage and high tree body of Populus euphratica，traditional monitoring methods are difficult to meet the requirement of rapid monitoring of pest.In this study，the NDVI time series data set of Xiamale forestry in Xinjiang Bachu was reconstructed from the MODIS data from 2014 to the first half of 2017，and the NDVI time series curves were further fitted by three filters.It is found that the S\|G filter can preserve more details of the original curve，and the global fitting can weaken the heterogeneity effectively，so that the vegetation coverage space is better.Through the analysis of the NDVI time series data of the aircraft control area and the comparison with catastrophe point of the non\|flight zone，it is found that the aircraft biological agent means has obvious and continual effects on the controlling of insect pests.proven by the investigation of pest’s population on the ground..The results showed that it was feasible to analyse the insect pests by using the time series of Populus euphratica NDVI.