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

Background Information for this page
Return to radar list for Hancock NH
Weather data for Hancock NH.  Forecast values begin September 15, 2011
    Continuous protection from June 25 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 5 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 Hancock NH.  Forecast values begin September 15, 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.)
0.36 Mon, August 1 Aug. 9  (Aug. 13) x August 31 (Sep. 14)
0.10 Tue, August 2 Aug. 10  (Aug. 14) x September 2 (Sep. 19)
0 Wed, August 3 Aug. 10  (Aug. 14) x September 2 (Sep. 19)
0 Thu, August 4 Aug. 10  (Aug. 14) x September 2 (Sep. 19)
0 Fri, August 5 Aug. 10  (Aug. 14) x September 2 (Sep. 19)
0.12 Sat, August 6 Aug. 10  (Aug. 14) x September 2 (Sep. 19)
0.41 Sun, August 7 Aug. 14  (Aug. 15) x September 5 (Sep. 22)
0.37 Mon, August 8 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0.50 Tue, August 9 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0.20 Wed, August 10 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0 Thu, August 11 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0 Fri, August 12 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0 Sat, August 13 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0.07 Sun, August 14 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
2.02 Mon, August 15 Aug. 15  (Aug. 17) x September 6 (Sep. 26)
0.19 Tue, August 16 Aug. 25  (Aug. 27) (Sep. 23) September 23 (> Oct. 31)
0.01 Wed, August 17 Aug. 27  (Aug. 30) (Sep. 27) September 29  
0 Thu, August 18 Aug. 27  (Aug. 30) (Sep. 27) September 29  
0.06 Fri, August 19 Aug. 27  (Aug. 30) (Sep. 27) September 29  
0 Sat, August 20 Aug. 27  (Aug. 30) (Sep. 27) September 29  
0.64 Sun, August 21 Aug. 27  (Aug. 30) (Sep. 27) September 29  
0.09 Mon, August 22 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0 Tue, August 23 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0 Wed, August 24 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0.61 Thu, August 25 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0 Fri, August 26 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0.71 Sat, August 27 Aug. 28  (Sep. 3) (Sep. 30) October 5  
3.56 Sun, August 28 Aug. 28  (Sep. 3) (Sep. 30) October 5  
0 Mon, August 29 Sep. 6 (Oct. 12) > Oct. 31  
0 Tue, August 30 Sep. 6 (Oct. 12)    
0 Wed, August 31 Sep. 6 (Oct. 12)    
0 Thu, September 1 Sep. 6 (Oct. 12)    
0 Fri, September 2 Sep. 6 (Oct. 12)    
0 Sat, September 3 Sep. 6 (Oct. 12)    
0 Sun, September 4 Sep. 6   (Oct. 12)    
1.18 Mon, September 5 Sep. 6 (Oct. 12)    
0.62 Tue, September 6 Sep. 7 (Oct. 16)    
1.52 Wed, September 7 Sep. 7 (Oct. 16)    
0.78 Thu, September 8 Sep. 22 (> Oct. 31)    
0 Fri, September 9 Sep. 23      
0 Sat, September 10 Sep. 24      
0 Sun, September 11 Sep. 25        
0 Mon, September 12 Sep. 26      
0 Tue, September 13 Sep. 27      
0.02 Wed, September 14 Sep. 28      
0.16 Thu, September 15 Sep. 29