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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 > Brown ambrosia aphid

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Brown ambrosia aphid

Uroleucon ambrosiae

Aphid species

Jeff Hahn, University of Minnesota

Aphid species

Jeff Hahn, University of Minnesota


Size: Up to 1/8 inch long

Description: Pear-shaped, dark red to brown color. They have long antennae and two cornicles ("tail pipes") on the rear of their abdomen (Identification of aphid species can be challenging; different species can be similarly colored).

Where/When:Feeds on petals and leaves of a variety of flowers including black-eyed Susan (Rudbeckia), coneflower, and sunflower. Active spring and summer; it is particularly noticeable from mid to late summer.

Significance:Generally does not cause damage. Could cause discoloration of flower petals and leaves, resulting in wilting if populations are high.

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