Cause An Ascochyta sp. has been reported from Washington, and a Ramularia sp. has been found in Oregon.
Symptoms Necrotic spots on leaves.
Cultural control None have been investigated in the Pacific Northwest.
Chemical control
- Bravo WeatherStik at 3 pints/A on 7- to 10-day intervals. Preharvest interval is 14 days. 12-hr reentry.
- Miravis Prime (Group 7 + 12) at 6.8 fl oz/A on 7-day intervals. Do not make more than two (2) sequential applications before alternating to a labeled fungicide with a different mode of action. Preharvest interval is 7 days. 12-hr reentry.
- Quadris Flowable at 6 to 15.5 fl oz/A on 7- to 14-day intervals. Do not apply more than one (1) foliar application of Quadris or other Group 11 fungicide before alternating to a labeled fungicide with a different mode of action. May be applied the day of harvest. 4-hr reentry.