We experienced a whole day of rain yesterday (5/4/09). Average temperature was 52F, and amount of precipitation was 0.76 inches. The total length of rain event was over 30 hours, including a day before and early this morning. Needless to say, it was long enough for Phomopsis, powdery mildew, and black rot.
Our Chardonnay had grown since the last observation. Average was about 60% 3-5 inch stage. Cabernet sauvignon still varies with vines, some vines are showing 6-70% 2-3 inch stage and others are showing 7-80% 1-2 inch stage.
We are having a break from rain today in most of central and northern VA. I hope those of whom with concern on Phomopsis had a chance to apply your treatment.