Abstract: Based on previous researches, this paper analyzed the disaster-pregnant environments and key ecological factors of Locusta migratoria manilensis outbreak in China. The results showed that there was a close relationship between Locusta migratoria manilensis outbreak and climate change. The distribution of the locust was limited by climatic zones, and its outbreak centers had the similar disaster-pregnant environmental characteristics. The outbreak and development of the locust was closely related to the thresholds of the main ecological factors such as hydrological and climate conditions, soil, and vegetation. Traditionally, the forecasting of locust outbreak was paid more attention to the correlativity between the quantitative dynamics of the locust and related ecological factors, but recently, a medium- and long term forecasting was approached based on large-scale climatic observation, with modern technologies such as remote sensing adopted in monitoring large-scale locust outbreak.

Key words: Three Gorges Area, Ground cover, Moss, Litter, Water storage characteristics