BIOS approach tested for controlling walnut pests in San Joaquin Valley

Bentley, W; Groh-Lowrimore, J; Grant, J; Pickel, C

BIOS approach tested for controlling walnut pests in San Joaquin Valley

Authors

Walt Bentley
Jeannine Groh-Lowrimore
Joseph A. Grant
Carolyn Pickel

Authors Affiliations

W. Bentley is IPM Entomologist, UC Kearney Agricultural Center, Parlier; J. Groh-Lowrimore is Staff Research Associate, UCCE, Stockton. The UC Sustainable Agriculture Research and Education Program funded this project. The authors wish to thank project growers for their vision and cooperation and CAFF for inspiring it; J.A. Grant is Farm Advisor, UC Cooperative Extension (UCCE), Stockton; C. Pickel is Area IPM Advisor, UCCE, Yuba City.

Publication Information

Hilgardia 57(3):86-92. DOI:10.3733/ca.v057n03p86. July 2003.

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Abstract

As concerns increase over changes in pesticide regulations, farmworker safety, surface and groundwater contamination and escalating costs and uncertainties associated with chemical controls, walnut growers need effective and cost-efficient ways to produce walnuts with minimal use of pesticides. This study compared the effectiveness of Biologically Integrated Orchard Systems (BIOS) with conventionally managed walnut orchards in the northern San Joaquin Valley from 1999 to 2001. We found no significant differences between BIOS and conventional blocks in nut quality or yields. Codling moth was effectively controlled by pheromone disruption and alternative pest-control methods. Mating disruption, by itself, appears to provide good control of codling moth in many orchards. However, it is still more expensive for growers than conventional pest-control methods.

References

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