Tiny greenish; looks like cabbage aphid but is not covered with whitish wax. Feeds in colonies on underside of leaves.
Curled leaves and yellowed plants.
Throughout United States, except in the Northwestern States. (Related species are found on turnips and mustard.)
Horticultural oil, insecticidal soap, Neem oil. Many predators, including lady beetles, lacewings, flower fly larvae, and damsel bugs, and tiny parasitic wasps help keep aphid populations in check naturally.
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