Abstract: In this study, suction trap was first applied for the survey and diversity analysis of arthropod community in an agroecosystem in China. A suction trap was installed in a winter wheat field in Yuanyang County of Henan Province to collect arthropods during the period from April 7 to June 2, 2010. A high species richness of the arthropod community was observed in the upper canopy of winter wheat, with 64 species from 8 orders and 39 families trapped. Diptera and Hemiptera were most dominant, followed by Coleoptera and Hymenoptera. The most dominant species were Sitobion miscanthi and Rhopalosiphum padi. The Cecidomyiidae and Chironomidae of Diptera and the Aphidiidae of Hymenoptera were also dominant. Based on the analysis of arthropod diversity, the species richness, total quantity, and diversity indices varied through time, mainly with an increasing trend, but the uniformity had less obvious variation. The occurrence of the main insect pests and natural enemies peaked after May 1, and the prevalent period of Aphidiidae was 10-20 days later than that of wheat aphids.

Key words: flower-visiting insect, forager, temporal pattern, landscape plant.