University of California

Pheromone-based pest management can be cost-effective for walnut growers


Kimberly P. Steinmann
Minghua Zhang
Joseph A. Grant
Carolyn Pickel
Rachael E. Goodhue

Authors Affiliations

K.P. Steinmann is Graduate Student, Department of Land, Air and Water Resources, UC Davis; M. Zhang is Associate Professor, Department of Land, Air and Water Resources, UC Davis; J.A. Grant is Farm Advisor, UC Cooperative Extension (UCCE), San Joaquin County; C. Pickel is Integrated Pest Management Advisor, UCCE Sutter/Yuba counties; R.E. Goodhue is Associate Professor, Department of Agricultural and Resource Economics, UC Davis.

Publication Information

Hilgardia 62(3):105-110. DOI:10.3733/ca.v062n03p105. June 2008.

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Many organophosphate and pyrethroid insecticides currently used by California walnut growers have been linked to negative environmental or human health impacts, increasing the probability of use restrictions and phase-outs. We assessed the acceptability of alternative reduced-risk strategies by comparing their costs to those of pest management programs currently in use among San Joaquin County walnut growers. To do this, we analyzed data from the California Department of Pesticide Regulation's legally mandated Pesticide Use Reports on actual pesticide applications for 3 years, from 2002 to 2004. While many factors other than cost influence growers’ pest management choices, we found that alternative strategies can be cost-competitive with conventional approaches, depending on the pest pressure and savings due to reductions in secondary pest outbreaks.


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Steinmann K, Zhang M, Grant J, Pickel C, Goodhue R. 2008. Pheromone-based pest management can be cost-effective for walnut growers. Hilgardia 62(3):105-110. DOI:10.3733/ca.v062n03p105
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