Fireblight infection conditions - MaryBlyt model logic

Background Information for this page
Return to radar list for Monmouth ME
Weather data for Monmouth ME.  Forecast values begin August 13, 2009
Shoots near overwintered fireblight cankers would start showing obvious symptoms around  Sunday, July 05
 If canker blight infection spreads to other shoots,
symptoms on those shoots would become obvious around Sunday, July 19
 
Range of potential
open-blossom dates
Gray box indicates dates when most trees will have lost open blossoms and susceptibility to blossom infection, but late blooming cultivars or young trees may still be susceptible.
Inches Rain,
Leaf Wet Hours,
DH65 heat units, &
Avg. Temperature
Daily fireblight risk rating
as per Maryblyt model criteria
by Dr. Paul Steiner and Gary Lightner. 

In absence of rain, 3 or more hours of leaf wetness counted as possible dew conditions for adequate wetting, which may overstate risk on such days.
Infection requirements:
Any rain, or >0.1 inch rain on previous day,
+ 198 cumulative degree hours > 65F,
+ Average temp. on wetting day >= 60F
Mac King Bloom
Tue, May 12 
  0.'',  0 hrs.,  0 DH,  50F No FB infection
Wed, May 13    0.'',  0 hrs.,  0 DH,  53F No FB infection
Thu, May 14    0.24'',  10 hrs.,  0 DH,  52F No FB infection
Fri, May 15    0.'',  11 hrs.,  20 DH,  60F No FB infection
Sat, May 16    0.09'',  5 hrs.,  13 DH,  53F No FB infection
Sun, May 17    0.39'',  13 hrs.,  10 DH,  52F No FB infection
Mon, May 18    0.'',  0 hrs.,  0 DH,  45F No FB infection
Tue, May 19    0.'',  6 hrs.,  0 DH,  49F No FB infection
Wed, May 20    0.'',  0 hrs.,  4 DH,  56F No FB infection
Thu, May 21    0.'',  0 hrs.,  205 DH,  68F No FB infection
Fri, May 22    0.'',  0 hrs.,  332 DH,  69F No FB infection
Sat, May 23    0.'',  0 hrs.,  222 DH,  54F No FB infection
Sun, May 24    0.14'',  16 hrs.,  233 DH,  56F No FB infection
Mon, May 25    0.'',  0 hrs.,  241 DH,  56F No FB infection
Tue, May 26    0.'',  0 hrs.,  98 DH,  48F No FB infection
Wed, May 27    0.69'',  16 hrs.,  73 DH,  45F No FB infection
Thu, May 28    0.6'',  24 hrs.,  0 DH,  46F No FB infection
Fri, May 29    0.32'',  24 hrs.,  0 DH,  50F No FB infection
Sat, May 30    0.31'',  20 hrs.,  11 DH,  58F No FB infection
Sun, May 31    0.21'',  20 hrs.,  14 DH,  54F No FB infection
Mon, June 1    0.'',  4 hrs.,  14 DH,  54F No FB infection
Tue, June 2    0.'',  0 hrs.,  24 DH,  59F No FB infection
Wed, June 3    0.'',  0 hrs.,  37 DH,  58F No FB infection
Thu, June 4    0.'',  0 hrs.,  45 DH,  59F No FB infection
Fri, June 5    0.'',  6 hrs.,  42 DH,  55F No FB infection
Sat, June 6    0.'',  8 hrs.,  48 DH,  57F No FB infection
Sun, June 7    0.'',  9 hrs.,  66 DH,  60F No FB infection
Mon, June 8    0.'',  0 hrs.,  71 DH,  59F No FB infection
Tue, June 9    0.33'',  16 hrs.,  35 DH,  51F No FB infection
Wed, June 10    0.06'',  24 hrs.,  26 DH,  52F No FB infection
Thu, June 11    0.'',  15 hrs.,  0 DH,  55F No FB infection
Fri, June 12    1.63'',  17 hrs.,  28 DH,  60F No FB infection
Sat, June 13    0.06'',  13 hrs.,  68 DH,  62F No FB infection
Sun, June 14    0.66'',  24 hrs.,  46 DH,  56F No FB infection
Mon, June 15    0.28'',  24 hrs.,  34 DH,  55F No FB infection
Tue, June 16    0.'',  11 hrs.,  51 DH,  59F No FB infection
Wed, June 17    0.'',  0 hrs.,  115 DH,  61F No FB infection
Thu, June 18    0.17'',  9 hrs.,  82 DH,  58F No FB infection
Fri, June 19    2.74'',  24 hrs.,  55 DH,  58F No FB infection
Sat, June 20    0.07'',  24 hrs.,  65 DH,  62F No FB infection
Sun, June 21    0.16'',  24 hrs.,  23 DH,  63F No FB infection
Mon, June 22    0.18'',  24 hrs.,  15 DH,  61F No FB infection