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Degree Day Accumulations

 
Cumulative Degree Days Recorded at Monmouth, ME
DATE
(Using a Start Date of April 10th)
Degree Days Accumulated
(Base Temperature of 45F)
Degree Days Accumulated
(Base Temperature of 50F)
As of end of 5/1/2008
64
23
As of end of 5/8/2008
104
43
As of end of 5/12/2008
128
47
As of end of 5/15/2008
(May 16th: 1 tipworm fly found in Troy and 1 found in Lincolnville as well)
155
59
NOTE: Temperature is recorded 6' off the ground at the Highmoor site (versus soil temperatures in Troy), which accounts for the lower degree day values here compared with the Troy location. Also, the 'true' starting date would probably need to be considerably sooner if using the Monmouth site (knowing which date to use for a 'start date' is a big question that needs to be resolved).

 
Degree Day Accumulations in Troy, ME
Date
Degree Days (soil)
(Base Temperature of 45F)
Degree Days (soil)
(Base Temperature of 50F)
As of end of 5/1/2007 (Troy)
89
44.5
As of end of 5/1/2008 (Troy)
179.6
81.6
 
As of end of 5/8/2007 (Troy)
175
95
As of end of 5/8/2008 (Troy)
259.4
126.4
As of end of 5/15/2008 (Troy)
(1 Tipworm fly found on May 16th in Troy, and 1 found in Lincolnville as well)
(50 sweeps at each site)
377.5
209.5
Stevens bud stages at site in Troy:
5/02/2008 photo
5/09/2008 photo
5/16/2008 photo
 PEST
YEAR
Degree Days Measured
Using Base Temperature of 45F
Degree Days Measured
Using Base Temperature of 50F
Cranberry Tipworm Flies
2007
~510
~344
2008
~377.5
~209.5
Blackheaded Fireworm larvae
2007
~456
~301
2008
~377.5
~209.5
Total soil DD measured for Tipworm & Blackheaded Fireworm, for both 2007 and 2008, and at two different base temperatures (until we are able to tell which one is a better predictor to use)

If you have comments or questions about this page,
contact Charles Armstrong at: charlesa@umext.maine.edu
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These pages are currently being maintained by the Pest Management Office, University of Maine Cooperative Extension. Page Last Modified: 05/16/08