Flyspeck prevention, Full-dose Pristine: July spray dates

Background Information for this page
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      Continuous protection from roughly 14 days after Petal Fall (May 27) until 30 days before harvest preserves maximum lag between end of protection from the final fungicide application and potential for visible SBFS before harvest. 
      With continuous protection prior to the final fungicide spray, apples harvested by September 20 should be at low risk of visible sooty blotch and flyspeck (SBFS) if the Protection End Date from the final fungicide application is after August 15.  Apples harvested by October 10 (or by  October 31) should be at low risk if the Protection End Date is after September 5 (or September 18).
     These estimates are based on moderate infection pressure and climatic average temperature and rain/wetting hour accumulation.  Block history, local SBFS fungal density, tree size, cultivar, pruning, wind & sun exposure, air drainage, mowing and other site characteristics determine the actual risk of SBFS becoming visible before harvest.
Weather data for Easthampton MA.  Forecast values begin November 1, 2017
Inches Rain Spray Date
Estimates assume that fungicide was applied before rain on spray date
Protection End Date
for full-dose
Pristine
(deadline for postinfection strobilurin or Topsin M)
Date flyspeck infections could appear
(Left side = rough guess of flyspeck show date if weather beyond end of forecast range is in top 20% of years for both temperature and wet hours.  An "x" means there is no need for this scenario because show date is within forecast range.
    
Right side = rough guess of flyspeck show date for small, open canopy, low-risk trees.)
0 Sat, July 1 July 14  (Jul 17) x August 12 (Sep. 2)
0.09 Sun, July 2 July 14  (Jul 17) x August 12 (Sep. 2)
0 Mon, July 3 July 18  (Jul 23) x August 16 (Sep. 6)
0 Tue, July 4 July 18  (Jul 23) x August 16 (Sep. 6)
0 Wed, July 5 July 18  (Jul 23) x August 16 (Sep. 6)
0 Thu, July 6 July 18  (Jul 23) x August 16 (Sep. 6)
0.65 Fri, July 7 July 18  (Jul 23) x August 16 (Sep. 6)
0.25 Sat, July 8 July 24  (Jul 27) x August 23 (Sep. 13)
0 Sun, July 9 July 24  (Jul 27) x August 23 (Sep. 13)
0 Mon, July 10 July 24  (Jul 27) x August 23 (Sep. 13)
0.60 Tue, July 11 July 24  (Jul 27) x August 23 (Sep. 13)
0.54 Wed, July 12 August 2  (Aug 4) x September 4 (Sep. 18)
0.31 Thu, July 13 August 2  (Aug 4) x September 4 (Sep. 18)
0.08 Fri, July 14 August 4  (Aug 7) x September 6 (Sep. 25)
0 Sat, July 15 August 5  (Aug 9) x September 9 (Sep. 26)
0 Sun, July 16 August 5  (Aug 9) x September 9 (Sep. 26)
0 Mon, July 17 August 5  (Aug 9) x September 9 (Sep. 26)
0.35 Tue, July 18 August 5  (Aug 9) x September 9 (Sep. 26)
0 Wed, July 19 August 5  (Aug 9) x September 9 (Sep. 26)
0.10 Thu, July 20 August 5  (Aug 9) x September 9 (Sep. 26)
0 Fri, July 21 August 5  (Aug 9) x September 9 (Sep. 26)
0 Sat, July 22 August 5  (Aug 9) x September 9 (Sep. 26)
0 Sun, July 23 August 5  (Aug 9) x September 9 (Sep. 26)
0.97 Mon, July 24 August 5  (Aug 9) x September 9 (Sep. 26)
0 Tue, July 25 August 12  (Aug 15) x September 16 (Oct. 8)
0 Wed, July 26 August 12  (Aug 15) x September 16 (Oct. 8)
0.14 Thu, July 27 August 12  (Aug 15) x September 16 (Oct. 8)
0 Fri, July 28 August 12  (Aug 15) x September 16 (Oct. 8)
0 Sat, July 29 August 12  (Aug 15) x September 16 (Oct. 8)
0 Sun, July 30 August 12  (Aug 15) x September 16 (Oct. 8)
0 Mon, July 31 August 12  (Aug 15) x September 16 (Oct. 8)