Abstract: Based on the population density, age structure, mortality and energy dynamics of Heliocoparva armigeria, its population production, ingestion and damage characteristics in eight different cotton field ecosystems are analysed. The results show that the energy production of H. armigeria population comes mainly from 3rd generation. The damaged amount of reproductive organs of cotton by the bollworm of 2nd, 3rd and 4th generations is respectively 11.83, 16.65 and 9.52 boils. m^-2. Along with the delay of cotton planting, the population production and ingestion of 2nd generation H. armigeria are decreased, and those of 3rd and 4th generation are increased. When the cotton intercropping is implemented, those are decreased for 2nd and 4th generations, and are increased for 3rd one.The ingestion-utilization efficiency of bollworm is increased with its increasing generation and its net ecological efficiency is maximum in 3rd generation, medium in 4th one, and minimum in 2nd one. The management strategies for bollworm is discussed in this paper.

Key words: Heliocoparva armigeria population, Energy dynamics, Cotton field ecosystem, macroinvertebrate, ABC curve, Andrias davidianus, environmental factors, habitat evaluation