July-August mite scouting frequency adjusted to ERM generation time

Background Information for this page
Return to Apple list for Easthampton MA
Weather data for Easthampton MA.  Forecast values begin May 25, 2018
    These estimates of maximum safe intervals between sampling dates for European red mite (ERM) are based on temperature-driven development rate.  The time required for ERM to grow from egg to reproductive adults changes dramatically between cool versus hot temperatures.  Weekly sampling is usually adequate, but is more frequent than needed during cool temperatures.  Knowing the number of days between generations allows growers to reduce sample frequency during cool weather, and alerts growers to periods of extremely rapid mite reproductive capacity requiring samples every 4 or 5 days to detect population increase before foliar damage and tree stress occurs. 
     The resample dates are constrained to require at least one sample during the 7 days before egglaying starts for each generation.  Date for 3rd generation eggs is in red, and 4th generation in blue.  Those dates may be in the June ERM sample date table.
     Recommended treatment thresholds change through the summer.  See Background page for definition of "below threshold" and "FAR BELOW threshold".
Date on which mites were monitored Number of days before resampling if mite density was
"below threshold"
   Resample date
   if mite density was
   "below threshold"
Resample date
if mite density was
 "FAR BELOW threshold"
Sun, July 1   ---> 6 --->     July 7, Sat July 13, Fri
Mon, July 2   ---> 6 --->     July 8, Sun July 14, Sat
Tue, July 3   ---> 6 --->     July 9, Mon July 15, Sun
Wed, July 4   ---> 6 --->     July 10, Tue July 15, Sun
Thu, July 5   ---> 6 --->     July 11, Wed July 16, Mon
Fri, July 6   ---> 5 --->     July 11, Wed July 17, Tue
Sat, July 7   ---> 5 --->     July 12, Thu July 18, Wed
Sun, July 8   ---> 5 --->     July 13, Fri July 19, Thu
Mon, July 9   ---> 5 --->     July 14, Sat July 20, Fri
Tue, July 10   ---> 5 --->     July 15, Sun July 21, Sat
Wed, July 11   ---> 5 --->     July 16, Mon July 22, Sun
Thu, July 12   ---> 5 --->     July 17, Tue July 22, Sun
Fri, July 13   ---> 5 --->     July 18, Wed July 23, Mon
Sat, July 14   ---> 5 --->     July 19, Thu July 24, Tue
Sun, July 15   ---> 5 --->     July 20, Fri July 25, Wed
Mon, July 16   ---> 5 --->     July 21, Sat July 26, Thu
Tue, July 17   ---> 5 --->     July 22, Sun July 27, Fri
Wed, July 18   ---> 5 --->     July 23, Mon July 28, Sat
Thu, July 19   ---> 5 --->     July 24, Tue July 29, Sun
Fri, July 20   ---> 5 --->     July 25, Wed July 30, Mon
Sat, July 21   ---> 5 --->     July 26, Thu July 31, Tue
Sun, July 22   ---> 5 --->     July 27, Fri August 1, Wed
Mon, July 23   ---> 5 --->     July 28, Sat August 2, Thu
Tue, July 24   ---> 5 --->     July 29, Sun August 3, Fri
Wed, July 25   ---> 5 --->     July 30, Mon August 4, Sat
Thu, July 26   ---> 5 --->     July 31, Tue August 6, Mon
Fri, July 27   ---> 5 --->     August 1, Wed August 7, Tue
Sat, July 28   ---> 5 --->     August 2, Thu August 8, Wed
Sun, July 29   ---> 5 --->     August 3, Fri August 9, Thu
Mon, July 30   ---> 5 --->     August 4, Sat August 10, Fri
Tue, July 31   ---> 5 --->     August 5, Sun August 11, Sat
Wed, August 1   ---> 5 --->     August 6, Mon August 12, Sun
Thu, August 2   ---> 5 --->     August 7, Tue August 14, Tue
Fri, August 3   ---> 5 --->     August 8, Wed August 15, Wed
Sat, August 4   ---> 5 --->     August 9, Thu August 16, Thu
Sun, August 5   ---> 5 --->     August 10, Fri August 17, Fri
Mon, August 6   ---> 5 --->     August 11, Sat August 18, Sat
Tue, August 7   ---> 6 --->     August 13, Mon August 19, Sun
Wed, August 8   ---> 6 --->     August 14, Tue August 20, Mon
Thu, August 9   ---> 6 --->     August 15, Wed August 21, Tue
Fri, August 10   ---> 6 --->     August 16, Thu August 23, Thu
Sat, August 11   ---> 6 --->     August 17, Fri August 24, Fri
Sun, August 12   ---> 6 --->     August 18, Sat August 25, Sat
Mon, August 13   ---> 6 --->     August 19, Sun August 26, Sun
Tue, August 14   ---> 6 --->     August 20, Mon August 27, Mon
Wed, August 15   ---> 6 --->     August 21, Tue August 28, Tue
Thu, August 16   ---> 6 --->     August 22, Wed August 30, Thu
Fri, August 17   ---> 6 --->     August 23, Thu August 31, Fri
Sat, August 18   ---> 6 --->     August 24, Fri No more ERM scouting
Sun, August 19   ---> 7 --->     August 26, Sun  
Mon, August 20   ---> 7 --->     August 27, Mon  
Tue, August 21   ---> 7 --->     August 28, Tue  
Wed, August 22   ---> 7 --->     August 29, Wed  
Thu, August 23   ---> 7 --->     August 30, Thu  
Fri, August 24   ---> 7 --->     August 31, Fri  
Sat, August 25     No more ERM scouting  
Sun, August 26      
Mon, August 27      
Tue, August 28      
end Display