Abstract: By using DYMEX 3.0 program to construct a bioclimatic model and using ArcGIS to treat graphs, this paper simulated and predicted the potential areas fitting for Helicoverpa armigrea survival in China under present climatic and future global warming scenarios. Under present climatic scenario, the habitats highly fitting for H. armigrea survival in China would be located in central and south Henan, north Anhui and Hubei, south Jiangxi and Fujian, Hunan, Guangxi, Guangdong, juncture of Shanxi and Gansu (Tianshui), and juncture of Sichuan and Tibet (Batang), moderately fitting habitats would be the most areas along the Yellow and Yangtze rivers, and low fitting habitats would be mainly in the three provinces of Northeast China, and Xinjiang, Tibet, and Qinghai. Under future global warming scenario (a 3 ℃ increase of air temperature by the end of this century), the northern border of moderately fitting habitats would be shifted from a line of Yingkou, Beijing, Shijiazhuang, Taiyuan, Yan’an, Lanzhou, and Batang to a line of Shenyang, Hohhot, Jiuquan, Gomud and Lhasa, with the latitude shifted northward 3° and the elevation increased by 300-500 m, the current low fitting habitats in large areas of Xinjiang would become moderately fitting habitats, some highly fitting habitats such as Tianshui and Batang would expand, and some habitats in Northern and Southern China, Taiwan, Hong Kong, and Hainan would shrink. A discussion on the prediction results was made, based on the biological characteristics of H. armigrea.

Key words: Wetland, Carex lasiocarpa population, Aboveground biomass, Plant height, Sheath height, Fractal dimension