Cranberry Degree Day Map and Update May 2, 2016
In general, it’s been fairly cool over the past two weeks, so we have not accumulated many more degree days than when we last reported on April 18th. However, cranberry plants in the central growing region of the state are now mostly in cabbage head, although those in the northern part of the state are predominantly still dormant. Even in the southernmost part of Wisconsin, Sparganothis fruitworm has not yet begun adult flight.
Cranberry Growing Degree Days are calculated using a base temperature of 41° F. 
Sparganothis Degree Days are calculated using a base temperature of 50° F.
