Winter moth is a non-native insect pest that causes damage to deciduous trees, particularly maples and oaks. 

Winter Moth Current Day Forecast.

Winter Moth 6-Day Forecast.

Pheno Forecast maps predict key life cycle stages in invasive and pest species, to improve management efficacy.  For insect pest species, Pheno Forecasts are based on published growing degree day (GDD) thresholds for key points in species life cycles. These key points typically represent life cycle stages when management actions are most effective. These maps are updated daily and available 6 days in the future.

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Species Background

Winter moth (Operophtera brumata) is a non-native insect that was first identified in the eastern United States in 2003. The caterpillars can defoliate certain species of deciduous trees. The species is present across New England, though damaging populations are only found in eastern Massachusetts, Rhode Island, and Maine. This pest does not appear to be spreading rapidly.