University of California

Beneficial insects move from flowering plants to nearby crops


Rachael Freeman Long
Andrew Corbett
Celia Lamb
Chris Reberg-Horton
Jeff Chandler
Michael Stimmann

Authors Affiliations

R. Freeman Long is UC Cooperative Extension Farm Advisor, Yolo and Solano counties; A. Corbett is Postdoctoral Researcher, Entomology, UC Davis; C. Lamb is Field Assistant, Agronomy, UC Davis; C. Reberg-Horton is Graduate Student, Agronomy, UC Davis; J. Chandler is Consultant, Corn Flower Farms, ElK Grove; M. Stimmann is Extension Environmental Toxicologist, UC Davis.

Publication Information

Hilgardia 52(5):23-26. DOI:10.3733/ca.v052n05p23. September 1998.

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Marking studies demonstrated that lady beetles, lacewings, syrphid flies and parasitic wasps fed on nectar or pollen provided by borders of flowering plants around farms; many insects moved 250 feet into adjacent field crops. Studies using the elemental marker rubidium also showed that syrphid flies, parasitic wasps and lacewings fed on flowering cover crops in orchards and that some moved 6 feet high in the tree canopy and 100 feet away from the treated area. The use of nectar or pollen by beneficial insects helps them survive and reproduce. Therefore, planting flowering plants and perennial grasses around farms may lead to better biological control of pests in nearby crops.


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Long R, Corbett A, Lamb C, Reberg-Horton C, Chandler J, Stimmann M. 1998. Beneficial insects move from flowering plants to nearby crops. Hilgardia 52(5):23-26. DOI:10.3733/ca.v052n05p23
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