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Return to Apple list for Easthampton MA
Weather data for Easthampton MA.  Forecast values begin November 1, 2017
Potential preharvest weather influences on
Storability, Preharvest Drop, Color, and Storage scald risk
     The August mean temperature was more than 1 degree F below the long term average.  Observations in Western NY have associated below normal August temperature with increased susceptibility of fruit to Low Temperature Injury during CA storage.
The McIntosh 10% drop date is only estimated after the date
of starch index at 3.5 to 4.5 is reported.
Date of first optimum weather for fruit coloring
is not estimated until date McIntosh expected to reach starch index 4.0 is within forecast range.
   Weather data indicate 165 chilling hours will have accumulated by Sunday October 22.  Research found that 500 ppm DPA for Cortland & 1000 ppm for Red Delicious is adequate for fruit harvested on or after October 22, and kept in Refrigerated Air storage.  Limited data suggest that same may also be true for McIntosh.  This is also the best guess for storage scald risk in Controlled Atmosphere storage.
Date Estimated cumulative chilling hours below 50 F
(threshold is 165 for reduced scald risk)
Interpretation of
accumulated chilling hours
Nov 1 232 DPA reduction possible for Del. And Cort.
Nov 2 246 DPA reduction possible for Del. And Cort.
Nov 3 246 DPA reduction possible for Del. And Cort.
Nov 4 255 DPA reduction possible for Del. And Cort.
Nov 5 270 DPA reduction possible for Del. And Cort.
Nov 6 275 DPA reduction possible for Del. And Cort.
Nov 7 275 DPA reduction possible for Del. And Cort.
Nov 8 287 DPA reduction possible for Del. And Cort.
Nov 9 311 DPA reduction possible for Del. And Cort.
Nov 10 335 DPA reduction possible for Del. And Cort.
Nov 11 358 DPA reduction possible for Del. And Cort.
Nov 12 377 DPA reduction possible for Del. And Cort.