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2020 Final Keeping Quality Forecast

Leela Uppala and Peter Jeranyama

The final keeping quality forecast is GOOD.

We calculated 7 points out of a possible 16 to arrive at this keeping quality forecast for the 2020 Massachusetts cranberry crop. This score is based on (1) the total of sunshine hours for February for the present year is less than the 50-year average for that month (143 hr), 1 point. (2) the total of sunshine hours for March for the present year is more than the 50-year average for that month (179 hr), 2 points. (3) the average temperature for April for the present year at Middleboro is below the April threshold of 44°F, 2 points. (4) the total precipitation for April for the present year is less than the average of East Wareham and Middleboro (6.70 inches), 1 point.  (5) the total precipitation for May for the present year is less than the average of East Wareham and Middleboro (3.20 inches), 1 point.

Implications

You may be able to reduce the number of fruit rot fungicide applications if your answer is yes to at least one of the following criteria. If a particular cranberry bed:

  • Held late water in spring 2020.
  • is planted with resistant varieties.
  • Had a low fruit rot incidence in 2019.

Even if you answered YES to one of the above three criteria, you should not reduce the number of fruit rot fungicide applications:

  • For newly planted beds.
  • Beds with excess vine growth that prevents rapid drying.

Please note:

  • Do not use a fungicide at less than the registered label rate.
  • Proper timing and uniform coverage of fungicides are critical for effective fruit rot management.  
  • Above normal sunshine hours during June, July and August (especially July) have been associated with good or better quality than predicted. Less than normal sunshine hours during these three months may result in keeping quality not as good as predicted.