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运用不同年份蝗虫发育过程中的遥感影像,结合实地调查反映资料,研究了MODIS归一化植被指数(NDVI)在监测蝗虫害中的应用。结果表明,该指数不仅能反映芦苇地蝗虫害的是否发生,还能反映不同区域蝗虫害的发生程度。在蝗虫卵孵化期的MODIS_NDVI图像上,指数值介于0.425～0.567的区域为蝗虫最适宜孵化区,高于0.732的区域则不利于蝗虫卵的孵化。这些研究结果为监测和预警农业蝗虫害的发生提供重要的依据。
Using the remote sensing images of locust development in different years and field survey data, the application of MODIS normalized vegetation index (NDVI) in monitoring locusts was studied. The results show that the index can not only reflect the occurrence of reed locusts, but also reflect the occurrence of locusts in different regions. MODIS_NDVI images of locust egg hatching period showed that the index value ranged from 0.425 to 0.567, which was the most suitable hatching area for locusts, while the area higher than 0.732 was not conducive to locust egg hatching. These findings provide an important basis for monitoring and early warning of the occurrence of agricultural locusts.