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Milkweed Aphids: Bright Yellow but Harmless to Monarchs

These yellow-orange aphids cluster on milkweed stems, jerking in unison when disturbed. They don't harm monarch caterpillars. Blast off with a strong water jet every few days; beneficial insects will clean up the rest.

milkweed aphid

About Gardening: Persistent Aphids on Hibiscus Spreading to Other Houseplants: Control Strategy; Identifying and Caring for a Ferocactus latispinus; Natural Aphid Control on Roses: Pet-Safe Methods for Bay Area Gardens; Effective Aphid Control on Mature Birch Trees; Amber "Eggs" in Soil Are Slow-Release Fertilizer; Puss Caterpillar: Identification, Sting Severity, and Safe Removal; Iris Aphids: Wash Off, Don’t Spray; Honey Mushrooms in the Lawn: Fungus Feeding on Old Roots; Saffron Crocus: Growing Your Own Precious Spice; Twig Girdler Beetles: Why Your Hardwoods Drop Green Twigs

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