Effects of Sophora alopecuroides Strips on Occurrence of Predatory Natural Enemies and Their Aphid Biocontrol Service in Corn Fields

doi:10.16409/j.cnki.2095-039x.2025.05.031

Abstract

Abstract: In order to clarify the arthropods community structure in Sophora alopecuroides strips along field ridge of Hexi region, and its effects on the density and biological control services of predatory enemies in adjacent corn field, systematic investigation and comparative study were carried out. The results showed that S. alopecuroides strips maintained high densities of Acyrthosiphon gossypii and Acyrthosiphon pisum from June to July, and conserved various predatory natural enemies such as ladybugs, predatory bugs, and lacewings, serving as an important conservation site for natural enemies on the field edge. During the aphid epidemic period, compared to the corn fields without S. alopecuroides strips, the densities of ladybugs and predatory natural enemies in corn fields with S. alopecuroides strips increased by 1.5 times and 1.3 times, respectively. The predator-to-aphid ratio increased by 2.3 times, while the density of aphids decreased by 1.8 times. This study confirms that S. alopecuroides is an important conservation functional plant for natural enemies in Hexi region, which provides a scientific basis for using it in ecological control of crop pests in the future.

Key words: Sophora alopecuroides, aphid, predatory natural enemy, functional plant, ecological regulation

CLC Number:

S476.2

FENG Hao, ZHANG Dawei, ZHOU Haohui, LIU Peilin, LIU Bing, WANG Senshan, LU Yanhui. Effects of Sophora alopecuroides Strips on Occurrence of Predatory Natural Enemies and Their Aphid Biocontrol Service in Corn Fields[J]. Chinese Journal of Biological Control, 2025, 41(3): 666-673.

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