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 31) 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 19.  Apples harvested by October 10 (or by  October 31) should be at low risk if the Protection End Date is after August 30 (or September 5).
     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 July 16, 2018
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 Sun, July 1 July 22  (Jul 24) (Aug. 6) August 15 (Aug. 29)
0 Mon, July 2 July 23  (Jul 24) (Aug. 7) August 17 (Sep. 1)
0 Tue, July 3 July 24  (Jul 26) (Aug. 9) August 19 (Sep. 3)
0 Wed, July 4 July 24  (Jul 26) (Aug. 9) August 19 (Sep. 3)
0 Thu, July 5 July 24  (Jul 26) (Aug. 9) August 19 (Sep. 3)
0.20 Fri, July 6 July 24  (Jul 26) (Aug. 9) August 19 (Sep. 3)
0 Sat, July 7 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Sun, July 8 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Mon, July 9 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Tue, July 10 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Wed, July 11 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Thu, July 12 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Fri, July 13 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Sat, July 14 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0.22 Sun, July 15 July 25  (Jul 29) (Aug. 10) August 21 (Sep. 5)
0 Mon, July 16 July 26  (Jul 30) (Aug. 11) August 22 (Sep. 7)
1.13 Tue, July 17 July 26  (Jul 30) (Aug. 11) August 22 (Sep. 7)
0.03 Wed, July 18 August 4  (Aug 8) (Aug. 20) September 1 (Sep. 18)
0 Thu, July 19 August 4  (Aug 8) (Aug. 20) September 1 (Sep. 18)
0 Fri, July 20 August 4  (Aug 8) (Aug. 20) September 1 (Sep. 18)
0 Sat, July 21 August 4  (Aug 8) (Aug. 20) September 1 (Sep. 18)
0.29 Sun, July 22 August 4  (Aug 8) (Aug. 20) September 1 (Sep. 18)
0.48 Mon, July 23 August 7  (Aug 11) (Aug. 23) September 4 (Sep. 23)
0.32 Tue, July 24 August 10  (Aug 14) (Aug. 26) September 7 (Sep. 28)
0.25 Wed, July 25 August 13  (Aug 17) (Aug. 29) September 11 (Oct. 4)
Thu, July 26 August 15  (Aug 19) (Aug. 31) September 14 (Oct. 9)
Fri, July 27 August 16  (Aug 20) (Sep. 1) September 15 (Oct. 12)
  Sat, July 28 August 17  (Aug 21) (Sep. 2) September 17 (Oct. 15)
Sun, July 29 August 18  (Aug 22) (Sep. 3) September 18 (Oct. 18)
Mon, July 30 August 18  (Aug 22) (Sep. 3) September 18 (Oct. 18)
Tue, July 31 August 19  (Aug 23) (Sep. 4) September 20 (Oct. 22)