Elm Leaf Beetle Control

Elm leaf beetles can seriously affect the health of Elm trees if the infestation is left alone. The larvae “skeletonize” the leaf surface while the adults chew entirely through the leaf. Not only does this process eliminate summer shade, reduce the aesthetic value of trees, and causes annoying leaf drop; frequent, widespread defoliation throughout the tree, weakens the Elm, causing tree’s health to decline rapidly and magnifying the need for elm leaf beetle control measures.

These beetles are about a 1/4 inch long, yellow to olive green in color, with a dark stripe down each side of their wing covers. There are usually four dark spots on the pronotum, the segment right behind their head. The eggs are orange and spindle-shaped and the larvae are wormlike, black and/or yellow and up to a 1/2 inch long. The pupae are orange-yellow with black bristles, allowing for easy identification when elm leaf beetle control is needed.

Adults overwinter in protected locations, often in houses or other structures. They emerge in the spring and move to Elm trees where they lay their eggs in groups of five to twenty five on the underside of leaves. The larvae skeletonize the leaves making them appear netlike. Elm Leaf Beetle larvae often move to the base of the tree in large numbers to pupate. There are two complete generations per year.

Catseye Pest Control provides elm leaf beetle control with full inspection services to determine what measures of treatment are best. Contact us today if you need assistance.