Flyspeck prevention with Group A fungicides (strobilurins and Topsin M): July spray dates

Background Information for this page
Return to radar list for Monmouth ME
    Continuous protection from July 3 until 30 days before harvest is recommended.  Flyspeck infections that begin before August 22 are likely to become visible around September 20.  Infections that begin before September 22 are likely to become visible around October 20.  But warm wet weather in September can accelerate flyspeck development resulting in earlier dates of flyspeck appearance before harvest.
     Application a strobilurin or Topsin M fungicide within 50 wet hours after the 'Protection end date' of the previous fungicide application may provide postinfection control.
Weather data for Monmouth ME.  Forecast values begin November 1, 2011
Inches Rain Spray Date
Estimates assume that fungicide was applied before rain on spray date
Protection End Date
for full-dose
Flint, Sovran, or
Topsin M
(deadline for postinfection strobilurin or Topsin M)
Date flyspeck infections could appear
(Left side = estimated 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 = estimated flyspeck show date for small, open canopy, low-risk trees.)
0.13 Fri, July 1 July 12  (Jul 25) x August 11 (Aug. 24)
0 Sat, July 2 July 13  (Jul 25) x August 12 (Aug. 24)
0.60 Sun, July 3 July 13  (Jul 25) x August 12 (Aug. 24)
0.01 Mon, July 4 July 25  (Jul 28) x August 14 (Aug. 26)
0 Tue, July 5 July 26  (Jul 29) x August 15 (Aug. 27)
0.54 Wed, July 6 July 26  (Jul 29) x August 15 (Aug. 27)
0.01 Thu, July 7 July 28  (Aug 1) x August 16 (Aug. 28)
0.02 Fri, July 8 July 29  (Aug 1) x August 18 (Sep. 1)
0.23 Sat, July 9 July 29  (Aug 1) x August 18 (Sep. 1)
0 Sun, July 10 July 30  (Aug 2) x August 19 (Sep. 2)
0 Mon, July 11 July 30  (Aug 2) x August 19 (Sep. 2)
0.53 Tue, July 12 July 30  (Aug 2) x August 19 (Sep. 2)
0.33 Wed, July 13 August 2  (Aug 4) x August 22 (Sep. 4)
0 Thu, July 14 August 2  (Aug 4) x August 22 (Sep. 4)
0 Fri, July 15 August 2  (Aug 4) x August 22 (Sep. 4)
0 Sat, July 16 August 2  (Aug 4) x August 22 (Sep. 4)
0 Sun, July 17 August 2  (Aug 4) x August 22 (Sep. 4)
0 Mon, July 18 August 2  (Aug 4) x August 22 (Sep. 4)
0 Tue, July 19 August 2  (Aug 4) x August 22 (Sep. 4)
0 Wed, July 20 August 2  (Aug 4) x August 22 (Sep. 4)
0 Thu, July 21 August 2  (Aug 4) x August 22 (Sep. 4)
0 Fri, July 22 August 2  (Aug 4) x August 22 (Sep. 4)
0 Sat, July 23 August 2  (Aug 4) x August 22 (Sep. 4)
0 Sun, July 24 August 2  (Aug 4) x August 22 (Sep. 4)
0.15 Mon, July 25 August 2  (Aug 4) x August 22 (Sep. 4)
0.65 Tue, July 26 August 2  (Aug 4) x August 22 (Sep. 4)
0.04 Wed, July 27 August 7  (Aug 9) x August 29 (Sep. 12)
0 Thu, July 28 August 7  (Aug 9) x August 29 (Sep. 12)
0.27 Fri, July 29 August 7  (Aug 9) x August 29 (Sep. 12)
0.40 Sat, July 30 August 10  (Aug 14) x September 3 (Sep. 19)
0 Sun, July 31 August 10  (Aug 14) x September 3 (Sep. 19)