Flyspeck prevention, Group A fungicides (strobilurins and Topsin M):  August-September spray dates

Background Information for this page
Return to radar list for Monmouth ME
Weather data for Monmouth ME.  Forecast values begin April 28, 2013
    Continuous protection from July 1 until 30 days before harvest is recommended.  Flyspeck infections that begin before August 17 are likely to become visible around September 20.  Infections that begin before August 29 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 April 28, 2013
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.)
Thu, August 1 Aug. 17  (Aug 21) (Sep. 7) September 21 (> Oct. 31)
Fri, August 2 Aug. 17  (Aug 21) (Sep. 7) September 21  
Sat, August 3 Aug. 18  (Aug 22) (Sep. 9) September 23  
Sun, August 4 Aug. 19  (Aug 23) (Sep. 10) September 25  
Mon, August 5 Aug. 20  (Aug 24) (Sep. 11) September 27  
Tue, August 6 Aug. 21  (Aug 25) (Sep. 13) September 29  
  Wed, August 7 Aug. 22  (Aug 26) (Sep. 14) October 1  
Thu, August 8 Aug. 23  (Aug 27) (Sep. 15) October 4  
Fri, August 9 Aug. 24  (Aug 28) (Sep. 17) October 6  
Sat, August 10 Aug. 25  (Aug 29) (Sep. 18) October 9  
Sun, August 11 Aug. 26  (Aug 30) (Sep. 19) October 12  
Mon, August 12 Aug. 27  (Aug 31) (Sep. 21) October 16  
Tue, August 13 Aug. 28  (Sep 1) (Sep. 22) October 19  
  Wed, August 14 Aug. 29  (Sep 2) (Sep. 24) October 24  
Thu, August 15 Aug. 30  (Sep 3) (Sep. 26) October 28  
Fri, August 16 Aug. 31 (Sep. 28) > Oct. 31  
Sat, August 17 Sep. 1 (Sep. 29)    
Sun, August 18 Sep. 2 (Oct. 1)    
Mon, August 19 Sep. 3 (Oct. 3)    
Tue, August 20 Sep. 4 (Oct. 5)    
  Wed, August 21 Sep. 5   (Oct. 7)    
Thu, August 22 Sep. 6 (Oct. 9)    
Fri, August 23 Sep. 7 (Oct. 12)    
Sat, August 24 Sep. 9 (Oct. 17)    
Sun, August 25 Sep. 10 (Oct. 20)    
Mon, August 26 Sep. 11 (Oct. 23)    
Tue, August 27 Sep. 12 (Oct. 26)    
  Wed, August 28 Sep. 13   (> Oct. 31)    
Thu, August 29 Sep. 14      
Fri, August 30 Sep. 15      
Sat, August 31 Sep. 16      
Sun, September 1 Sep. 17      
Mon, September 2 Sep. 18      
Tue, September 3 Sep. 19      
  Wed, September 4 Sep. 20        
Thu, September 5 Sep. 21      
Fri, September 6 Sep. 22      
Sat, September 7 Sep. 23      
Sun, September 8 Sep. 24      
Mon, September 9 Sep. 25      
Tue, September 10 Sep. 26      
  Wed, September 11 Sep. 27        
Thu, September 12 Sep. 28      
Fri, September 13 Sep. 29      
Sat, September 14 Sep. 30      
Sun, September 15 Oct. 1