FIRE BLIGHT! The Maryblyt prediction will be updated with actual recorded temperatures tomorrow morning, but temperatures through the weekend and the forecast through Apr 27 are similar to what was shown in the Maryblyt graphic below, posted Apr 22. There was a threat of fire blight infection anywhere that had rain in the Winchester area today.
The wetting period Apr 22-23 was likely too cool for quince rust infection, but temperatures last night and tonight are more favorable and blossoms are near their peak of susceptibility.