Study of Remote Sensing Monitoring for the Damage of Apocheima cinerarius on Tugai forest in Middle Reaches Area of the Tarim River Based on Time Series

【Objective】 The study aims to explore a large area monitoring method for the damage of Apocheima cinerarius larvae on Tugai forest in middle reaches area of the Tarim River. 【Method】This paper made use of satellite HJ A/Bsatellite CCD data to construct monitoring model in Tarim National Nature Reserve based on time series for monitoring the damage of Apocheima cinerarius on Tugai forest. 【Result】In April 2017, NDVI average value of Tugai forest increased first, decreased in late April, and shortly afterwards the NDVI began to rise again; From middle of April to early May, when the larva of spring geometrid was mainly at the 3rd instar, 4th instar and 5th instar, the forest of Apocheima cinerarius was seriously damaged, and its monitoring accuracy was as high as 85%. However, from late March to early April, when the first instar and 2nd instar were the dominant larvae, Populus euphratica was less harmful and its monitoring accuracy was lower than 5. The result showed that the forest of Populus euphratica in Luntai County, west of the study area, was damaged first, then the east part of Yuli County was damaged afterwards.【Conclusion】China's HJ satellite can effectively monitor the damage of Apocheima cinerarius on Tugai forest in middle reaches area of the Tarim River, but only when the Tugai forest damage is serious, the accuracy is high. From the time point of view, from mid-April to early May, the larvae of Apocheima cinerarius were 3, 4 and 5 years old, this was the main period of the serious harm of the spring inchworm. From a spatial point of view, because of the earlier spring moth in the west of the study area, the Tugai forest was damaged first, and because the spring geometrid occurred relatively late in Yuli County on the east side, the Tugai forest was damaged later by the Apocheima cinerarius.