Flyspeck prevention, Group A fungicides(strobilurins and Topsin M): 1st cover through June

Background Information for this page
Return to Apple list for Easthampton MA
   Sooty bloch and Flyspeck (SBFS) are caused by a variety of fungal species.  SBFS fungi begin colonizing and growing on young fruit about 14 days after Petal Fall, and about half of the season's total SBFS colonies have begun by 50 days after Petal Fall (May 31 to July 5 at this location).  While precise timing of protection against SBFS is much less critical than for fire blight and apple scab, to preserve maximum lag between the end of protection by the final fungicide application and potential for visible SBFS before harvest, maintain continuous fungicide protection from May 31 until 30 days before harvest.
Weather data for Easthampton MA.  Forecast values begin July 16, 2018
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 = rough guess of 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 = rough guess of flyspeck show date for small, open canopy, low-risk trees.)
0 Tue, May 29 June 19  (Jun. 23) x July 26 (Aug. 9)
0 Wed, May 30 June 20  (Jun. 23) x July 26 (Aug. 9)
0 Thu, May 31 June 21  (Jun. 24) (Jul. 26) July 26 (Aug. 10)
0.03 Fri, June 1 June 22  (Jun. 24) (Jul. 26) July 26 (Aug. 10)
0 Sat, June 2 June 23  (Jun. 26) (Jul. 27) July 28 (Aug. 11)
0 Sun, June 3 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.79 Mon, June 4 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.07 Tue, June 5 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Wed, June 6 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Thu, June 7 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Fri, June 8 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Sat, June 9 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Sun, June 10 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Mon, June 11 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Tue, June 12 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.01 Wed, June 13 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Thu, June 14 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.05 Fri, June 15 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Sat, June 16 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0 Sun, June 17 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.84 Mon, June 18 June 24  (Jun. 27) (Jul. 28) July 30 (Aug. 13)
0.18 Tue, June 19 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0 Wed, June 20 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0 Thu, June 21 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0 Fri, June 22 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0.03 Sat, June 23 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
1.22 Sun, June 24 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0.15 Mon, June 25 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0 Tue, June 26 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0.39 Wed, June 27 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
2.01 Thu, June 28 June 28  (Jul. 7) (Jul. 30) August 4 (Aug. 18)
0 Fri, June 29 July 20  (Jul. 22) (Aug. 5) August 13 (Aug. 27)
0 Sat, June 30 July 21  (Jul. 23) (Aug. 5) August 13 (Aug. 27)