The outbreak of the Asian migratory locust (Locusta migratoria migratoria) (AML) can deal a great blow to agriculture and grassland farming. emergence high-density locusts facilitates locusts. Understanding forming mechanism spot (HDSL) is very important for monitoring control. To achieve this goal, paper took Nong’an County, which used form an HDSL in 2017, as study area. Firstly, based on hab...