An apple scab infection period occurred Apr 18-19 with 28-hr wetting at 47-50°F and 0.52 inches of rain. This length of wetting, coupled with the possibility of secondary infection from lesions that resulted from inadeqate protection Mar 24-25 could raise serious secondatry fruit infection issues in the coming month.
Temperatures are slightly lower than those presented in yesterday's Maryblyt graphic but still present a fire blight blossom infection threat for today.
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
