Pest Control Erie, PA

Hours. Mon-Fri 9AM-5PM, Sat-Sun 9AM-12PM

Address. 650 French St, Erie, PA 16501

Tel. (814) 352-4590

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Elm Leaf Beetle

The elm leaf beetle can cause substantial problems for elm trees and for people living in homes near elm trees. An elm tree that becomes severely infested with elm leaf beetles may be noticeably affected. Homeowners who have elm trees nearby may also notice elm leaf beetles inside the house during the winter months. These tiny insects may attempt to move indoors during the winter in an effort to survive, becoming more active and moving back outside when winter ends. Though the elm leaf beetle doesn’t feed or reproduce more offspring over the winter months, most homeowners with an infestation aren’t willing to cohabit with these insects.

Infestations with elm leaf beetles can be prevented somewhat through the use of insecticides. On elm trees, it may also be useful to do trunk banding and use systemic insecticides to control populations. If you’ve noticed that the leaves of an elm tree have dried up and died prematurely, you might suspect that the tree has been infested with elm leaf beetles. When the infestation grows big enough, the tree may take on a distinctly brownish appearance and be somewhat weakend by the insects. An elm tree that has been repeatedly infested may even have branches that die and become susceptible to injuries as a result of wind. Elm leaf beetles are particularly fond of Siberian elms, but all species of elm trees can be damaged by infestations of these insects.

Large numbers of elm leaf beetles may try to take up residence indoors during the winter months, much to the dismay of homeowners. They can be observed seeking shelter around the house or inside the house crawling into cracks and crevices, particularly around windows and doors. The adult elm leaf beetle is most likely to take up residence in a home or in woodpiles. They don’t eat or reproduce while inside of a house, but they may become active on warm and sunny days during the winter months inside the home, causing homeowners distress.

In the spring, when the weather warms a bit, the elm leaf beetle will find its way back outside to the nearest elm tree. When the leaves emerge, the elm leaf beetle begins to infest the tree and create small holes in the leaves. The female beetle lays her yellow eggs on the leaves as well. These eggs are shaped like tiny footballs.

Both the adult elm leaf beetle and the larva feed on the leaves avoiding the upper surface and preferring the undersurface to avoid the large veins. Larva will grow, molting several times through three different stages (also known as instars). Larvae reach their full size within a few weeks and then they stop eating and begin the process of pupation, which must take place at the base of the tree or within the folds of the bark. The adult emerges from the pupae within a week or two. After the adults and larva have fed on the elm leaf, it may simply dry up and fall off the tree prematurely.

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