Boxwood Leafminer

Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology. GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity. GDD is credited to be first defined by Reaumur in 1735.

Cecidomyia est un genre d'insectes de l'ordre des diptères, du sous-ordre des nématocères et de la famille des Cecidomyiidae.

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