Main page content begins here

The larger boxelder leafroller (Archips negundana) is a green caterpillar found on Manitoba maple (boxelder) trees during spring and early summer. The caterpillar feeds on the leaves, webbing them together with silk. If disturbed, the larva quickly drops from the tree, suspended by a silken thread.

The Problem

Caterpillar webbing and feeding damage looks unsightly. Dead foliage often bleaches, giving the tree a whitish appearance. Heavy infestations can result in complete defoliation of the tree.

What You Can Do

In most situations, intervention is not required as little tree mortality has been observed. Established Manitoba maple trees in the Edmonton area that are completely defoliated over several consecutive years appear to recover and continue to grow normally. These trees have the ability to compensate for the caterpillar defoliation by producing a second set of leaves so that they appear nearly normal by the end of the summer.

For More Information

Pest Management

12304 107 Street NW
Edmonton AB  T5G 2S7

Telephone

In Edmonton: 311

Outside Edmonton: 780-442-5311

Email treebugs@edmonton.ca

End of page content. Please choose between the following five options:

Back to main menu Back to current page menu and content View current page breadcrumb Back to site search Continue to page footer content