Adelges Abietis -

In North America, the population consists entirely of females that reproduce parthenogenetically (without mating).

Immature nymphs, known as "stem mothers" or fundatrices , overwinter at the base of spruce buds. adelges abietis

Unlike many related adelgids that require two different conifer species to complete their life cycle, Adelges abietis is typically "monoecious," meaning it can complete its entire life cycle on a single host—usually the Norway spruce ( Picea abies ). In North America, the population consists entirely of

The Eastern Spruce Gall Adelgid: An Ecological Profile of Adelges abietis In North America

In early spring, these nymphs mature and lay hundreds of eggs. As these eggs hatch, the new nymphs begin feeding on the developing needles. Gall Formation: A Complex Plant-Insect Interaction

Plant Hyperplasia induced with a Cell-free Insect Extract | Nature