Fire blight pressure low to moderate through April 25; secondary scab infection possible where control was inadequate Mar 27-28.

At Winchester apple trees are mostly at mid-bloom. 

Fire blight: With prevailing cool temperatures, current fire blight pressure remains low to moderate through Apr 25 in the Winchester area, the Shenandoah Valley, and across much of northern Virginia. Conditions through Apr 25 are not favorable for fire blight infection in the Roanoke and east of the Blue Ridge south of Charlottesville, however some of these areas had earlier potential infection Mar 28-31 and Apr 7-9.

Scab: At the AREC we received a marginal apple scab infection period Apr 17-18: 14 hr wet at 47° with 0.08 in. rain. Most of the scab ascospores have been discharged signalling the end of the primary infection, but where protection was inadequate during the Mar 27-28 infection period, expect lesions to be appearing, and secondary infection could be possible with predicted wetting events later this week.
   
At Winchester, we have had 12 days favorable for apple powdery mildew infection since spores were available.

This will be updated again Apr 28.