The ecological niches of several pests of cruciferous vegetables.
Author of the article:WU Wei-Jian
Author's Workplace：(Laboratory of Insect Ecology, South China Agricultural University, Guangzhou 510642,China).
Key Words：Plutella xylostella; Pieris rapae; Phyllotreta st riolata; Phaedon brassicae; niche
Abstract：The niche breadth and niche overlap of four pests on the same trophic level (cruciferous plants) were estimated with Levins index and Pianka's measure in three dimensions: trophic level, time and spatial resources array. The resul ts show that the four