Population Spatio-temporal Dynamics of Aphids and Predatory Ladybugs of Alfalfa Fields in Hexi Region

doi:10.16409/j.cnki.2095-039x.2025.03.005

Abstract

Abstract: Alfalfa is an important crop in the arid and semi-arid ecologically fragile areas of Hexi. In this study, the composition structure of arthropod community and the spatio-temporal pattern of main pest aphids and dominant predatory natural enemies of alfalfa field in Hexi region were systematically studied by means of ecology and geostatistics. In the community investigation, a total of 60641 individuals were collected, belonging to 2 classes, 9 orders, 33 families and 67 species. Aphids were the dominant pests and ladybugs were dominant predatory natural enemies of alfalfa field. The analysis of spatio-temporal pattern showed that aphids were most closely related to Propylaea japonica, showing obvious time and space-following effect in the field. Alfalfa has the application potential of natural enemy conservation and ecological control of insect pests as an important functional plant in Hexi region.

Key words: alfalfa, arthropods community, aphids, Propylaea japonica, spatio-temporal pattern

CLC Number:

S476.2

PAN Ye, ZHANG Dawei, HE Xiaoling, FU Xiaowei, LU Yanhui. Population Spatio-temporal Dynamics of Aphids and Predatory Ladybugs of Alfalfa Fields in Hexi Region[J]. Chinese Journal of Biological Control, 2025, 41(2): 284-290.

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