Apple scab:  Primary infection period ratings

Background Information for this page
Return to radar list for Belchertown MA
Weather data for Belchertown MA.  Forecast values begin May 21, 2012
      These ratings are relative because they do not account for scab spore population density, which is the MOST important factor determining absolute infection risk.  Estimates also do not account for any secondary scab spores that might be present from earlier uncontrolled primary scab infection periods.  
Date Observed & Forecast
Inches Rain
McIntosh
bud stage
1 in 20 chance that daily value is equal or less than Estimated Portion
of Total Annual

Primary Scab Infection Potential on this day
(cumulative scab infection potential in parentheses)
1 in 20 chance that daily value is more than
Thu, March 22  0 50% Green Tip    
Fri, March 23  0    
Sat, March 24  0 Half-inch Green    
Sun, March 25  0.03    
Mon, March 26  0    
Tue, March 27  0    
Wed, March 28  0.12          
Thu, March 29  0    
Fri, March 30  0    
Sat, March 31  0.20    
Sun, April 1  0.16    
Mon, April 2  0.01    
Tue, April 3  0    
Wed, April 4  0.04 early Tight Cluster        
Thu, April 5  0 Tight Cluster    
Fri, April 6  0    
Sat, April 7  0    
Sun, April 8  0    
Mon, April 9  0    
Tue, April 10  0    
Wed, April 11  0.02   0 < 1  (< 1) < 1
Thu, April 12  0.10 0 < 1  (< 1) < 1
Fri, April 13  0    
Sat, April 14  0 Open Cluster    
Sun, April 15  0 full Pink-extended    
Mon, April 16  0.03 late Pink < 1 < 1  (< 1) < 1
Tue, April 17  0 King Bloom    
Wed, April 18  0          
Thu, April 19  0    
Fri, April 20  0    
Sat, April 21  0 Full Bloom    
Sun, April 22  1.37 24% 35% (36%) 46%
Mon, April 23  1.13 9% 12% (48%) 16%
Tue, April 24  0    
Wed, April 25  0          
Thu, April 26  0.08 < 1 < 1 (49%) < 1
Fri, April 27  0.06    
Sat, April 28  0    
Sun, April 29  0    
Mon, April 30  0    
Tue, May 1  0.66 95% Petal Fall 30% 33% (82%) 36%
Wed, May 2  0 100% Petal Fall        
Thu, May 3  0.30 < 1 < 1 (82%) < 1
Fri, May 4  0.03    
Sat, May 5  0.02    
Sun, May 6  0    
Mon, May 7  0.02 Fruit Set < 1 < 1 (83%) 1%
Tue, May 8  0.57 4% 13% (96%) 22%
Wed, May 9  0.27   0 < 1 (96%) < 1
Thu, May 10  0.62    
Fri, May 11  0    
Sat, May 12  0    
Sun, May 13  0    
Mon, May 14  0.26 0 2% (98%) 4%
Tue, May 15  0.68 0 2% (100%) 4%
Wed, May 16            < 1
Thu, May 17       
Fri, May 18       
Sat, May 19       
Sun, May 20       
Mon, May 21    0 < 1 (100%) < 1
Tue, May 22        < 1
Wed, May 23             
Thu, May 24       
Fri, May 25       
Sat, May 26       
Sun, May 27       
Mon, May 28    Last formula in cell above.  Rows above may appear blank due to conditional formatting.