Apple Scab (below) is normally reproducing and spreading this time of year and a break in the rain may give growers a short window of opportunity to spray protectant fungicides to protect new, susceptible foliage before the next round of precipitation.
Continue to protect new growth for Apple Scab (above) with fungicides (such as Banner, Captan/Maestro, Dithane, Luna, Fontelis) Mix single-site fungicides such as Luna or Fontelis with a general fungicide such as Captan or Dithane to reduce possibility of resistance.
Fireblight (above) prediction models are showing medium-high levels of caution this week based on the weather forecast but the possibility of fireblight increases dramatically if the weather becomes warmer and wetter. Foliar (floral) applications of products for Fireblight (such as copper, Kasumin, streptomycin) should continue to reduce numbers of fireblight bacteria on floral structures (stigmas) throughout the bloom period. The floral stigmas are the main entry point for fireblight into the tree.
Keep an eye out for powdery mildew as it can overwinter in the buds. If you haven’t been putting on Captan/Maestro or Dithane, try mixing Nova or Fontalis or Manzate with Captan or Dithane in your next fungicide application to help manage powdery mildew on nursery crops.