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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Beetles, bugs, ants, and other insects without obvious wings - Under 1/4 inch long > Rose aphid

Rose aphid

Macrosiphum rosae

Rose aphid

Jeff Hahn, University of Minnesota

Rose aphid

Jeff Hahn, University of Minnesota


Size: 1/16 - 1/8 inch long

Where/When: Feeds in groups on the tips of new shoots and buds of roses. Aphids are active from June through October.

Significance: Low to moderate numbers cause little or no damage. Heavy infestations can cause distortion of young leaves and stunt new growth. Honeydew (aphid waste product) attracts ants and sooty mold (black fungus) may grow on it.

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