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

Background Information for this page
Return to radar list for Middletown RI
    Continuous protection from June 14 until 30 days before harvest is recommended.  Flyspeck infections that begin before August 27 are likely to become visible around September 20.  Infections that begin before September 26 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 Middletown RI.  Forecast values begin October 14, 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 Fri, July 1 July 9  (Jul 13) x August 4 (Aug. 14)
0 Sat, July 2 July 9  (Jul 13) x August 4 (Aug. 14)
0.03 Sun, July 3 July 9  (Jul 13) x August 4 (Aug. 14)
0 Mon, July 4 July 9  (Jul 13) x August 4 (Aug. 14)
0 Tue, July 5 July 9  (Jul 13) x August 4 (Aug. 14)
0 Wed, July 6 July 9  (Jul 13) x August 4 (Aug. 14)
0 Thu, July 7 July 9  (Jul 13) x August 4 (Aug. 14)
1.55 Fri, July 8 July 9  (Jul 13) x August 4 (Aug. 14)
0.51 Sat, July 9 July 23  (Jul 25) x August 14 (Aug. 25)
0 Sun, July 10 July 31  (Aug 5) x August 21 (Sep. 4)
0 Mon, July 11 August 1  (Aug 5) x August 21 (Sep. 4)
0.14 Tue, July 12 August 2  (Aug 6) x August 21 (Sep. 4)
0.81 Wed, July 13 August 3  (Aug 6) x August 22 (Sep. 4)
0.36 Thu, July 14 August 4  (Aug 6) x August 24 (Sep. 5)
0 Fri, July 15 August 5  (Aug 7) x August 24 (Sep. 5)
0 Sat, July 16 August 6  (Aug 7) x August 25 (Sep. 6)
0 Sun, July 17 August 7  (Aug 9) x August 26 (Sep. 7)
0.08 Mon, July 18 August 7  (Aug 9) x August 26 (Sep. 7)
0 Tue, July 19 August 7  (Aug 9) x August 26 (Sep. 7)
0 Wed, July 20 August 7  (Aug 9) x August 26 (Sep. 7)
0 Thu, July 21 August 7  (Aug 9) x August 26 (Sep. 7)
0 Fri, July 22 August 7  (Aug 9) x August 26 (Sep. 7)
0.17 Sat, July 23 August 7  (Aug 9) x August 26 (Sep. 7)
0.02 Sun, July 24 August 8  (Aug 12) x August 28 (Sep. 8)
0.08 Mon, July 25 August 8  (Aug 12) x August 28 (Sep. 8)
0.28 Tue, July 26 August 8  (Aug 12) x August 28 (Sep. 8)
0 Wed, July 27 August 9  (Aug 13) x August 30 (Sep. 9)
0 Thu, July 28 August 9  (Aug 13) x August 30 (Sep. 9)
0 Fri, July 29 August 9  (Aug 13) x August 30 (Sep. 9)
0 Sat, July 30 August 9  (Aug 13) x August 30 (Sep. 9)
0 Sun, July 31 August 9  (Aug 13) x August 30 (Sep. 9)