Aphids are the most common insect found on trees and shrubs. There are many species of aphids that feed on numerous hosts. Aphids use their piercing sucking mouthparts to extract sap from the tender, new growth of plants. While aphid feeding does not look good, it usually doesn’t cause serious damage to plants. However, aphids do excrete a sticky substance called honeydew that can be a real nuisance, as it gets all over sidewalks, vehicles, etc.
As the most common insect found on trees and shrubs and with over 350 different species, aphids feed on numerous species of trees. Some of the most common trees to be attacked by aphids include ash, birch, spruce, willow, apple, and elm trees.
Early detection is key in reducing infestations of aphids. Examine areas near the buds and on the undersides of the new leaves for aphids. When natural enemies, like the lady beetle, are not sufficient in keeping the population in check, insecticides are very effective for controlling aphids. Contact insecticides can be used on exposed aphids, but are not effective against species that develop in leaf curls. Soil applied systemic insecticides are also very effective and can be applied once in the fall or spring to deliver control throughout the growing season.
Aphids are an easily controlled pest with Xytect™. Biological control can be aided by lady beetles and green lacewings.
A Diagnostic Guide is designed to help you identify a pest issue and management solutions. Always refer to product label for all rates and approved uses. Some images courtesy forestryimages.org. Use of the images does not imply endorsement of treatments by forestryimages.org