Plum curculio protection period

Background Information for this page
Return to radar list for Greenville RI
   Need for protection against plum curculio egglaying begins around fruit set. 
    A final plum curculio insecticide application on Thursday, May 26 is expected to give adequate protection until the end of the immigration period on Wednesday, June 8 (indicated by yellow highlight).
If using Surround deterrent, rough estimate for decline in plum curculio egglaying is Friday, June 24.
Weather data for Greenville RI.  Forecast values begin September 20, 2011
95% McIntosh Petal Fall estimated or reported as:  May 13,  Friday
Full-dose
Plum Curculio insecticide
application date
PC degree days accumulated on spray date Inches
Rain
Estimated
end of protection
Percent of
PC control period
(& PC degree days)
completed by end of protection
Fri, May 13   95% McIntosh
Petal Fall
0 May 17, Tue 4%   (12) 
Sat, May 14   4 0.02 May 17, Tue 4%   (12) 
Sun, May 15   11 0.78 May 17, Tue 4%   (12) 
Mon, May 16   12 0.30 May 19, Thu 8%   (26) 
Tue, May 17   12 1.02 May 19, Thu 8%   (26) 
Wed, May 18   17 0.44 May 24, Tue 22%   (68) 
Thu, May 19   26 0.96 June 15, Wed 100%   (416) 
Fri, May 20   35 0.19 June 1, Wed 73%   (225) 
Sat, May 21   44 0 June 2, Thu 78%   (240) 
Sun, May 22   47 0 June 4, Sat 83%   (257) 
Mon, May 23   51 0.29 June 5, Sun 86%   (266) 
Tue, May 24   68 0.36 June 6, Mon 91%   (282) 
Wed, May 25   84 0 June 7, Tue 98%   (303) 
Thu, May 26   99 0 June 8, Wed 100%   (330) 
Fri, May 27   120 0 June 9, Thu 100%   (354) 
Sat, May 28   140 0 June 24, Fri 100%   (568) 
Sun, May 29   161 0 June 11, Sat 100%   (382) 
Mon, May 30   184 0 June 11, Sat 100%   (382) 
Tue, May 31   206 0 June 11, Sat 100%   (382) 
Wed, June 1   225 0.64 June 11, Sat 100%   (382) 
Thu, June 2   240 0 June 12, Sun 100%   (388) 
Fri, June 3   249 0 June 12, Sun 100%   (388) 
Sat, June 4   257 0 June 12, Sun 100%   (388) 
Sun, June 5   266 0.01 June 12, Sun 100%   (388) 
Mon, June 6   282 0 June 12, Sun 100%   (388) 
Tue, June 7   303 0 June 12, Sun 100%   (388) 
Wed, June 8   330 0.04 June 12, Sun 100%   (388)