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 Friday, May 18 is expected to give adequate protection until the end of the immigration period on Friday, June 1 (indicated by yellow highlight).
If using Surround deterrent, rough estimate for decline in plum curculio egglaying is Thursday, June 7.
Weather data for Greenville RI.  Forecast values begin May 17, 2012
95% McIntosh Petal Fall estimated or reported as:  April 26,  Thursday
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
Thu, April 26   95% McIntosh
Petal Fall
0 May 8, Tue 11%   (32) 
Fri, April 27   1 0.01 May 9, Wed 13%   (41) 
Sat, April 28   3 0 May 9, Wed 13%   (41) 
Sun, April 29   5 0 May 9, Wed 13%   (41) 
Mon, April 30   8 0 May 9, Wed 13%   (41) 
Tue, May 1   8 0.65 May 9, Wed 13%   (41) 
Wed, May 2   8 0 May 10, Thu 16%   (48) 
Thu, May 3   9 0.22 May 10, Thu 16%   (48) 
Fri, May 4   13 0.03 May 10, Thu 16%   (48) 
Sat, May 5   17 0.06 May 10, Thu 16%   (48) 
Sun, May 6   21 0 May 10, Thu 16%   (48) 
Mon, May 7   28 0 May 10, Thu 16%   (48) 
Tue, May 8   32 0.20 May 10, Thu 16%   (48) 
Wed, May 9   41 1.06 May 15, Tue 34%   (105) 
Thu, May 10   48 0.75 May 20, Sun 53%   (162) 
Fri, May 11   53 0 May 22, Tue 61%   (189) 
Sat, May 12   66 0 May 22, Tue 61%   (189) 
Sun, May 13   81 0 May 23, Wed 66%   (205) 
Mon, May 14   93 0 May 24, Thu 71%   (218) 
Tue, May 15   105 0.57 May 25, Fri 74%   (229) 
Wed, May 16   118 0.58 May 29, Tue 89%   (273) 
Thu, May 17   127 0 May 31, Thu 96%   (297) 
Fri, May 18   135 0 June 1, Fri 100%   (310) 
Sat, May 19   147 0 June 2, Sat 100%   (323) 
Sun, May 20   162 0 June 3, Sun 100%   (337) 
Mon, May 21   175 0 June 3, Sun 100%   (337) 
Tue, May 22   189 0.41 June 3, Sun 100%   (337) 
Wed, May 23   205 0.16 June 6, Wed 100%   (377) 
Thu, May 24   218 0 June 7, Thu 100%   (391) 
Fri, May 25   229   June 7, Thu 100%   (391) 
Sat, May 26   239   June 7, Thu 100%   (391) 
Sun, May 27   250   June 7, Thu 100%   (391) 
Mon, May 28   262   June 8, Fri 100%   (406) 
Tue, May 29   273   June 9, Sat 100%   (420) 
Wed, May 30   285   June 10, Sun 100%   (434) 
Thu, May 31   297   June 11, Mon 100%   (449) 
Fri, June 1   310   June 12, Tue 100%   (464)