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

Background Information for this page
Return to radar list for Hollis NH
    Continuous protection from June 4 until 30 days before harvest is recommended.  Flyspeck infections that begin before August 5 are likely to become visible around September 20.  Infections that begin before September 9 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 Hollis NH.  Forecast values begin November 1, 2012
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 Sun, July 1 July 15  (Jul. 26) x August 14 (Sep 13)
0.02 Mon, July 2 July 16  (Jul. 26) x August 16 (Sep 14)
0 Tue, July 3 July 17  (Jul. 26) x August 16 (Sep 14)
0.45 Wed, July 4 July 18  (Jul. 26) x August 17 (Sep 17)
0 Thu, July 5 July 19  (Jul. 26) x August 17 (Sep 17)
0 Fri, July 6 July 20  (Jul. 26) x August 17 (Sep 17)
0 Sat, July 7 July 21  (Jul. 26) x August 19 (Sep 17)
0 Sun, July 8 July 22  (Jul. 26) x August 19 (Sep 17)
0 Mon, July 9 July 23  (Jul. 26) x August 20 (Sep 17)
0 Tue, July 10 July 24  (Jul. 27) x August 23 (Sep 18)
0 Wed, July 11 July 25  (Jul. 27) x August 23 (Sep 18)
0 Thu, July 12 July 26  (Jul. 27) x August 26 (Sep 21)
0 Fri, July 13 July 27  (Jul. 29) x September 1 (Sep 26)
0 Sat, July 14 July 28  (Jul. 31) x September 4 (Sep 28)
0.06 Sun, July 15 July 29  (Aug. 1) x September 5 (Sep 29)
0 Mon, July 16 July 30  (Aug. 2) x September 7 (Sep 30)
0 Tue, July 17 July 31  (Aug. 3) x September 9 (Oct 1)
0.19 Wed, July 18 July 31  (Aug. 3) x September 9 (Oct 1)
0 Thu, July 19 August 1  (Aug. 5) x September 12 (Oct 2)
0 Fri, July 20 August 1  (Aug. 5) x September 12 (Oct 2)
0 Sat, July 21 August 1  (Aug. 5) x September 12 (Oct 2)
0 Sun, July 22 August 1  (Aug. 5) x September 12 (Oct 2)
0.07 Mon, July 23 August 1  (Aug. 5) x September 12 (Oct 2)
0.23 Tue, July 24 August 1  (Aug. 5) x September 12 (Oct 2)
0 Wed, July 25 August 1  (Aug. 5) x September 12 (Oct 2)
0.16 Thu, July 26 August 1  (Aug. 5) x September 12 (Oct 2)
0.10 Fri, July 27 August 1  (Aug. 5) x September 12 (Oct 2)
0.66 Sat, July 28 August 1  (Aug. 5) x September 12 (Oct 2)
0.05 Sun, July 29 August 5  (Aug. 9) x September 20 (Oct 5)
0 Mon, July 30 August 5  (Aug. 9) x September 20 (Oct 5)
0.22 Tue, July 31 August 5  (Aug. 9) x September 20 (Oct 5)