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  • MSU Extension
  • Michigan State University Ag Bio Research
  • Project Greeen

East Lansing (MSUHort) Grape Berry Moth Predictive Model Report Assist Chart (Report issued 4/21/2014 2:48 )

This model tracks predicted percent of egglaying and predicts the start of second and third generation egglaying (810, 1620 and 2430 GDD Base 47F from the biofix of wild grape bloom, respectively). Record the date of wild grape bloom at your location to use this model.

Degree day accumulation (Base 47F, from 3/1) on 4/21/2014: 100.3

Degree day accumulation (Base 47F, from 3/1) on 4/28/2014 is forecast to be: 121.3
Model available after 300 DD (Base 50F) from 3/1.