Flyspeck prevention for Low Risk trees, Group A fungicides:  July spray dates

Background Information for this page
Return to radar list for Sanford ME
This table is only for trees with LOW Flyspeck risk.
See Background Information for defintion of Low Risk 
     2nd generation flyspeck spores from border row hosts become available around June 22.  Beyond that date preventive or postinfection flyspeck control is advised up until 30 days before the latest possible harvest date.
     Postinfection control of flyspeck requires application of a strobilurin or Topsin M fungicide within 50 wet hours aft June 22, the estimated end of the 50 wet hour postinfection control window is June 25.
     Flyspeck infection risk increases with development of 3rd generation spores around July 14. 
     Flyspeck infections that occur after protective fungicide coverage is depleted but within about 30 days before harvest will only have enough development time to appear if unusually wet weather prevails in the weeks prior to harvest.  Presumably, late-season flyspeck infections require about 270 wet hours to become visible.
Weather data for Sanford ME.  Forecast values begin October 17, 2008
Inches Rain Spray Date on Low Risk trees
- assumes that fungicide was applied before any rain recorded on spray date
Protection End Date
for Flint, Pristine, Sovran,
or Topsin M
applied on spray date
Deadline for
postinfection strobilurin or
Topsin M application
(= 50 wet hours after protection ends)
Latest Safe Storage
(& Fresh pick)
Harvest Dates with low Flyspeck risk
- Storage date assumes fruit will be cool and dry within 50 hours after harvest
0.22 Tue, July 1 July 19 July 21 August 2  (Aug 6)
0.49 Wed, July 2 July 19 July 21 August 2  (Aug 6)
0.19 Thu, July 3 July 20 July 22 August 5  (Aug 7)
0.15 Fri, July 4 July 20 July 22 August 5  (Aug 7)
0 Sat, July 5 July 20 July 22 August 5  (Aug 7)
0 Sun, July 6 July 20 July 22 August 5  (Aug 7)
0 Mon, July 7 July 20 July 22 August 5  (Aug 7)
0 Tue, July 8 July 20 July 22 August 5  (Aug 7)
0.39 Wed, July 9 July 20 July 22 August 5  (Aug 7)
0 Thu, July 10 July 20 July 22 August 5  (Aug 7)
0 Fri, July 11 July 20 July 22 August 5  (Aug 7)
0 Sat, July 12 July 20 July 22 August 5  (Aug 7)
0 Sun, July 13 July 20 July 22 August 5  (Aug 7)
0.10 Mon, July 14 July 20 July 22 August 5  (Aug 7)
0 Tue, July 15 July 20 July 22 August 5  (Aug 7)
0 Wed, July 16 July 20 July 22 August 5  (Aug 7)
0 Thu, July 17 July 20 July 22 August 5  (Aug 7)
1.23 Fri, July 18 July 20 July 22 August 5  (Aug 7)
0.59 Sat, July 19 July 24 July 30 August 9  (Aug 11)
1.20 Sun, July 20 July 24 July 30 August 9  (Aug 11)
0.65 Mon, July 21 July 24 July 30 August 9  (Aug 11)
0.01 Tue, July 22 July 24 July 30 August 9  (Aug 11)
0.51 Wed, July 23 July 24 July 30 August 9  (Aug 11)
2.59 Thu, July 24 July 27 August 1 August 10  (Aug 13)
0.04 Fri, July 25 August 3 August 6 August 16  (Aug 29)
0 Sat, July 26 August 3 August 6 August 16  (Aug 29)
0.59 Sun, July 27 August 3 August 6 August 16  (Aug 29)
0 Mon, July 28 August 3 August 6 August 16  (Aug 29)
0 Tue, July 29 August 3 August 6 August 16  (Aug 29)
0 Wed, July 30 August 3 August 6 August 16  (Aug 29)
1.00 Thu, July 31 August 3 August 6 August 16  (Aug 29)