Yesterday we received several rains totaling 3.6 inches at a mean temperature of 70°. This volume of rain would remove most of any protective fungicide residue applied before the rains, indicating need for tightening spray intervals for summer disease control on apples and for reliable control of brown rot on peaches and other stone fruits. Scab symptoms are very evident on non-protected peaches.
Wetting hours accumulated last week (38) brought our total to 383 hours. This is less than for this time last year, but ahead of 2010 and 2011.
Disease management information directed mostly to the Frederick County Virginia tree fruit industry, updated as needed throughout the growing season. Keith Yoder, Virginia Tech Agricultural Research and Extension Center, Winchester, Virginia
About Me
- Keith Yoder
- Professor Emeritus of Plant Pathology, Virginia Tech Ag. Research and Extension Center, Winchester, VA
