Control aphids

Whitney Cranshaw, Colorado State University,


Aphids suck the juices out of new shoots, buds and leaves. They cause new growth to be curled, stunted or puckered. Leaves can turn yellow and drop. As they feed, Aphids can also transmit diseases from one plant to another. Aphids produce honeydew, a sweet, sticky substance that hosts black sooty mold and attracts some Ants. If you miss the Aphids clustered along new growth, you may see Black Mold on lower leaves from fungus growing on deposited honeydew. Or you might see Ants racing up and down stems feeding on the sweet honeydew. In some cases, controlling Ants can also help control Aphids. Aphids over-winter on plant parts or debris (survive the winter) and they come out in the spring, where they can live in large clusters, especially on new growth. In these large clusters, some Aphids can develop wings and move on to other plants. Aphids are most damaging in the spring and summer.



Aphids are found throughout the United States.


Similar or Related Pests

Leafhoppers, Adelgids and Whiteflies