UC Ag Experts Talk: Epidemiology and Control of the Invasive Red Leaf Blotch Disease of Almond

Dr. Florent Trouillas reviewed the main symptoms of red leaf blotch disease in almond, including seasonal progression. He presented elements of the pathogen’s biology, including the disease cycle, the main spore types, and inoculum sources. He also described the seasonal dynamics of sporulation and host susceptibility. Finally, the presentation covered disease management strategies, including cultural practices, fungicide efficacy, and optimal timing of fungicide applications. The webinar was recorded on February 18, 2026 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: Dr. Florent Trouillas, Cooperative Extension Specialist with the Department of Plant Pathology at UC Davis and the Kearney Agricultural Research and Extension Center Watch other recorded webinars    • UC Ag Experts Talk Webinars   Visit https://ucanr.edu/sites/ucexpertstalk/ for information about webinars. Visit http://ipm.ucanr.edu/training/ for information about UC IPM online courses. UC Ag Experts Talk webinars are partially supported by National Institute of Food and Agriculture, U.S. Department of Agriculture, Crop Protection and Pest Management Extension Implementation Program.