Abstract: To understand the interspecies relationships among common Limacodidae species on Shanghai green belt plants, the niche breadth, niche overlap, niche similarity, and interspecies competition of Cnidocampa flavescens, Setora postornata, Parasa lepida and Parasa consocia were studied in trophic, temporal, and spatial resources series. The results showed that P. consocia could use more host resources than other three species, and its niche breadth index was 0.5447. C. flavescens and S. postornata occupied more time resources, with the niche breadth index being 0.4304 and 0.4415, respectively. C. flavescens cocoons manifested the greatest spatial resources predominance, and the niche breadth index was 0.5441. As for the interspecies relationships, S. postornata and P. lepida were more adjacent in the utilization of trophic resources, and the indices of their niche overlap (2.6647), niche similarity (0.5199) and interspecies competition (0.7015) were all higher than those of other co-existing species. C. flavescens and S. postornata were more similar in using time resources, with the niche overlap and interspecies competition indices being 0.4846 and 0.5222, respectively, while S. postornata and P. consocia were more adjacent in the utilization of spatial resources, and had the highest indices of niche overlap (2.7495), niche similarity (0.9165), and interspecies competition (0.9959).

Key words: P supply level, Maize growth, P uptake, Zn uptake