Apple scab:  Primary infection period ratings

Background Information for this page
Return to Apple list for Easthampton MA
Weather data for Easthampton MA.  Forecast values begin May 25, 2018
      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 Portion of Annual Primary Scab Infection Potential on this day
(cumulative scab infection potential in parentheses)
1 in 20 chance that daily value is more than
Wed, April 18  0 50% Green Tip    
Thu, April 19  0.18    
Fri, April 20  0    
Sat, April 21  0    
Sun, April 22  0    
Mon, April 23  0    
Tue, April 24  0          
Wed, April 25  0.96 0 < 1  (< 1) 2%
Thu, April 26  0.20 Half-inch Green    
Fri, April 27  0.30 0 < 1  (1%) 1%
Sat, April 28  0.03    
Sun, April 29  0.22 0 < 1  (2%) < 1
Mon, April 30  0.08     < 1
Tue, May 1  0 early Tight Cluster        
Wed, May 2  0 Tight Cluster    
Thu, May 3  0.13 Open Cluster < 1 2%  (4%) 4%
Fri, May 4  0.19 full Pink-extended 0 < 1  (4%) < 1
Sat, May 5  0    
Sun, May 6  0.39 late Pink 6% 12%  (16%) 18%
Mon, May 7  0    
Tue, May 8  0 King Bloom        
Wed, May 9  0    
Thu, May 10  0 Full Bloom    
Fri, May 11  0    
Sat, May 12  0.23 11% 17%  (34%) 24%
Sun, May 13  0    
Mon, May 14  0    
Tue, May 15  0.98   22% 32%  (66%) 42%
Wed, May 16  0    
Thu, May 17  0 95% Petal Fall    
Fri, May 18  0 100% Petal Fall    
Sat, May 19  0.47 13% 17%  (83%) 22%
Sun, May 20  0.14 1% 3%  (86%) 4%
Mon, May 21  0    
Tue, May 22  0.09 Fruit Set 1% 4%  (89%) 6%
Wed, May 23  0    
Thu, May 24  0    
Fri, May 25  0    
Sat, May 26  0.06 0 < 1  (90%) < 1
Sun, May 27  0.47 0 8%  (98%) 17%
Mon, May 28  0.22 0 < 1  (98%) < 1
Tue, May 29  0          
Wed, May 30  0    
Thu, May 31  0    
Fri, June 1  0    
Sat, June 2  0.07 0 1%  (99%) 3%
Sun, June 3  0.07 < 1  (100%)