The Town of Newmarket does not treat/manage trees on private property, however there are some steps residents can take to protect their trees from LDDs. Due to the favourable climate for the LDD moth, the developmental stages for LDD moths have been accelerated by a month. As the LDD moth is currently in the pupae/cocoon stage, residents can remove their burlap traps and any kind of trap from their trees and keep them for use next season.
Mid July (current year) to April (following year)
Scrape and destroy egg masses. You can do this by scraping egg masses off trees and placing them in a bucket of soap water for a day or two. Please wear gloves while doing this work as the caterpillars can irritate your skin.
April to June
Consider applying insecticide such as BTK or Tree Azin – both insecticides are not harmful to people or the environment. Many products have a tight window in order for the application to be successful. We recommend you contact a licensed tree care company to learn about your options to manage LDD.
May to early July
Use burlap bands to trap LDD caterpillars. Wrap a 45cm piece of the burlap entirely around the tree's trunk at chest height to catch the caterpillars. Tie a piece of string half-way up the burlap and fold the top section down over the string to create a skirt. This trap should be checked daily and any captured caterpillars should be removed and placed in a container of soapy water for a day or two before being disposed of. Please wear gloves while doing this work as the caterpillars can irritate your skin.
June to July
During this time, you can handpick the caterpillars/pupae/cocoon and place them in a bucket of soapy water for a day or two. Please wear gloves while doing this work as the caterpillars/pupae/cocoon can irritate your skin.