Plum curculio protection period

Background Information for this page
Return to radar list for Belchertown MA
   Need for protection against plum curculio egglaying begins around fruit set. 
    A final plum curculio insecticide application on Wednesday, May 16 is expected to give adequate protection until the end of the immigration period on Tuesday, May 29 (indicated by yellow highlight).
If using Surround deterrent, rough estimate for decline in plum curculio egglaying is Tuesday, June 12.
Weather data for Belchertown MA.  Forecast values begin May 21, 2012
95% McIntosh Petal Fall estimated or reported as:  May 1,  Tuesday
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
Tue, May 1   95% McIntosh
Petal Fall
0.66 May 10, Thu 16%   (49) 
Wed, May 2   1 0 May 12, Sat 22%   (67) 
Thu, May 3   2 0.30 May 13, Sun 27%   (83) 
Fri, May 4   8 0.03 May 14, Mon 31%   (95) 
Sat, May 5   15 0.02 May 15, Tue 35%   (107) 
Sun, May 6   22 0 May 15, Tue 35%   (107) 
Mon, May 7   30 0.02 May 15, Tue 35%   (107) 
Tue, May 8   34 0.57 May 15, Tue 35%   (107) 
Wed, May 9   43 0.27 May 16, Wed 40%   (122) 
Thu, May 10   49 0.62 May 19, Sat 50%   (153) 
Fri, May 11   54 0 May 21, Mon 59%   (181) 
Sat, May 12   67 0 May 22, Tue 63%   (195) 
Sun, May 13   83 0 May 23, Wed 69%   (212) 
Mon, May 14   95 0.26 May 24, Thu 75%   (231) 
Tue, May 15   107 0.68 May 28, Mon 98%   (301) 
Wed, May 16   122 0.33 May 29, Tue 100%   (314) 
Thu, May 17   130 0.05 May 30, Wed 100%   (326) 
Fri, May 18   139 0 June 1, Fri 100%   (350) 
Sat, May 19   153 0.14 June 2, Sat 100%   (362) 
Sun, May 20   170 0 June 3, Sun 100%   (374) 
Mon, May 21   181 0.12 June 4, Mon 100%   (387) 
Tue, May 22   195 0.18 June 5, Tue 100%   (399) 
Wed, May 23   212 0 June 6, Wed 100%   (412) 
Thu, May 24   231 0 June 7, Thu 100%   (425) 
Fri, May 25   251 0 June 8, Fri 100%   (439) 
Sat, May 26   270 0 June 9, Sat 100%   (452) 
Sun, May 27   287 0 June 10, Sun 100%   (465) 
Mon, May 28   301 0 June 11, Mon 100%   (480) 
Tue, May 29   314   June 11, Mon 100%   (480)