We are all excited that May will be bringing us beautiful flowers; however, May also brings us nasty, unwanted Wintermoths. These larvae (worms) hatch and feed ravenously on leaves beginning mid-May. They feed on leaf clusters and inside buds during the day, and inch their way to the outside of leaves at night. In June they stop feeding and drop down to the ground and bury themselves in the soil until fall.
In October and November adult males emerge to mate. It is common to see them flying around your porch lights in the evening at this time of year. The females, who have no wings, climb up tree trunks and lay eggs in bark crevices for the start next season’s moths.
Treatments of Wintermoths begin in May, and can control the winter moth larvae population, and mitigate the risks to your trees. Wintermoth treatment methods include foliar application and micro injection, available in both biological and traditional controls.
If you have had Wintermoth damage in the past, it is recommended that you speak with an arborist to determine an appropriate Wintermoth insect management strategy. Control these pests in the spring to prevent year-long pest damage to your trees.