University of Maryland Extension

Holly berry Gall Midge - Trees and Shrubs

unripe berries

Holly berry gall midge causes berries of holly to remain green during the fall and winter. The adult midge lays eggs in the young fruit of hollies while the petals are still present. The maggots hatch and feed inside the developing fruit. The berries grow to near normal size but remain green.

Management

There are no chemical controls. Early blooming trees are more likely to be attacked. There are resistant cultivars available. Check with your local nursery for cultivars in your area.

hollyberry midge adult
Holly berry midge adult

hollyberry normal and infested
Normal holly berry and infested berry

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