Stripe Rust Now Confirmed in Shelly

Sorry to keep bombarding you with information, but thanks to reports by various consultants in the field I wanted to send out an additional stripe rust update to indicate the current status.

Stripe rust is still being reported in the Magic Valley (Rupert, Hazleton through Twin Falls area) in both Brundage and WB 470. BOTH OF THESE VARIETIES ARE SUSCEPTIBLE. Please follow label directions when applying fungicides as many are not labeled for application beyond Feekes 10.5 (i.e. 50% flowering). The areas affected are usually small "hot spots" and not necessarily large acreages. WARMER weather is predicted, which should slow down the rate of growth and spread of the fungus and initiate High Temperature Adult Plant Resistance (HTAP); however, cool nights are still conducive for infection even when daytime temperatures reach into the lower 80's.

Stripe rust has now been reported as far North as the Shelley, ID area in a field of Brundage that was sprayed with fungicides at herbicide application, and was sprayed again this week,

Additional information and a fungicide efficacy chart is available on our website: http://www.extension.uidaho.edu/scseidaho/

Juliet Marshall, Ph.D.

Associate Professor, Cereals Pathology and Agronomy
Idaho Falls R&E Center
1776 Science Drive Suite 205
Idaho Falls, ID 83402
208-529-8376 office
208-390-4859 cell