Return To Blog

Four Signs Your Denver Tree is Infested with Aphids or Mites

With hundreds of species, aphids and mites are some of the most common pests to harm trees. It’s important to know the starting signs of an infestation before it becomes a bigger problem as they reproduce at rapid rates. A single aphid can give birth to over 100 aphids in 30 days and can take over massive amounts of foliage in very little time.

1. Discoloration of leaves
When aphids and mites feed on tree leaves, they procure a brown, yellow, or spotted appearance. When leaves of trees become damaged, they prematurely fall. This damage can stress a tree to the point where it could be in danger of dying.

2. Visual inspection of leaves for colonies of aphids or mites
Mites are very tiny and not easily seen unless a colony is clustered on the underside of a leaf. A good way to sample your tree for mites is to hold a piece of white paper under a branch and shake the foliage forcefully. If mites are in your tree, the shaking will dislodge them and they will appear as tiny dark moving specks on your paper. Aphids are larger and will be easier to see when inspecting the underside of a leaf for infestation.

Spider mites, which are very common, can actually produce silk and will weave webs to protect their eggs from enemies. Their eggs are laid near the veins of the leaves and even after hatching, the egg shells are left and can be helpful when visually diagnosing an infestation.
4.A dripping effect on the tree
Aphids themselves aren’t so much a problem to a tree. It’s their production of sticky honeydew that can cause a mess. Honeydew is an aphid’s waste material that can cover leaves, branches, and anything beneath it, hence the dripping effect. The honeydew molds and attracts all kinds of bugs, especially ants. Ants keep aphid’s natural enemies at bay, and the infestation can get worse.

Aphids and mite infestations are difficult to control and get rid of. Denver tree care services from American Arbor Care can provide effective insect treatments to ensure that your tree regains and maintains its health.