Flyspeck prevention, Full-dose Captan or Ziram: August-September spray dates

Background Information for this page
Return to radar list for Greenville RI
Weather data for Greenville RI.  Forecast values begin October 14, 2011
    Continuous protection from June 13 until 30 days before harvest is recommended.  Flyspeck infections that begin before August 18 are likely to become visible around September 20.  Infections that begin before September 25 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 Greenville 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
Captan or Ziram
(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 Mon, August 1 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0.26 Tue, August 2 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0 Wed, August 3 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0 Thu, August 4 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0 Fri, August 5 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0.09 Sat, August 6 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
1.86 Sun, August 7 Aug. 7  (Aug. 9) x September 3 (Sep. 19)
0.44 Mon, August 8 Aug. 10  (Aug. 14) x September 7 (Sep. 22)
0.86 Tue, August 9 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0.48 Wed, August 10 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0 Thu, August 11 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0 Fri, August 12 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0 Sat, August 13 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0.16 Sun, August 14 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
2.26 Mon, August 15 Aug. 15  (Aug. 18) x September 14 (Sep. 25)
0.02 Tue, August 16 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Wed, August 17 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Thu, August 18 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Fri, August 19 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0.16 Sat, August 20 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0.18 Sun, August 21 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0.35 Mon, August 22 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Tue, August 23 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Wed, August 24 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Thu, August 25 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0.08 Fri, August 26 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0.68 Sat, August 27 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
2.54 Sun, August 28 Aug. 28  (Sep. 5) x September 25 (Oct. 3)
0 Mon, August 29 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Tue, August 30 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Wed, August 31 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Thu, September 1 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Fri, September 2 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Sat, September 3 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Sun, September 4 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0 Mon, September 5 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
1.68 Tue, September 6 Sep. 6  (Sep. 7) x September 28 (Oct. 13)
0.73 Wed, September 7 Sep. 8  (Sep. 14) x September 30 (Oct. 18)
2.12 Thu, September 8 Sep. 8  (Sep. 14) x September 30 (Oct. 18)
0 Fri, September 9 Sep. 23  (Sep. 25) x October 17 (> Oct. 31)
0 Sat, September 10 Sep. 23  (Sep. 25) x October 17  
0 Sun, September 11 Sep. 23  (Sep. 25) x October 17  
0 Mon, September 12 Sep. 23  (Sep. 25) x October 17  
0 Tue, September 13 Sep. 23  (Sep. 25) x October 17  
0 Wed, September 14 Sep. 23  (Sep. 25) x October 17  
0.28 Thu, September 15 Sep. 23  (Sep. 25) x October 17