UC Ag Experts Talk: Alfalfa Insects and Their Management in California

Michael Rethwisch discussed damage and control of alfalfa weevils, including insecticide resistance. He spoke about aphid species affecting California alfalfa production and mentioned effects on yield and quality and control measures including biologicals. Also discussed were caterpillar pests, including information on new pests in California. Finally other insects that cause damage almost every year somewhere in the state were discussed. This included western flower thrips, spider mites, and blister beetles.

The webinar was recorded on March 13, 2024 and targeted to growers and pest management professionals. For Master Gardeners and others serving home environments, please note that management methods, especially any pesticides mentioned, are not to be used without a clear understanding of their legal use. Continuing Education credits are not available for recorded webinars. Closed captions are being reviewed for accuracy and will be corrected as necessary.

Speaker: Michael Rethwisch, Farm Advisor in Crop Production and Entomology with the University of California Cooperative Extension in Riverside County