serviceberry tree pest
1 Response
This looks like the frass deposits of lacebugs. Here is our website fact sheet on lacebugs and their control: http://extension.umd.edu/hgic/lace-bugs-trees-and-shrubs
We do not recommend using a systemic insecticide containing neonicotinoids (Merit, or imidicloprid is a common one) on any flowering plants that would attract bees and other pollinators because that class of chemicals as been implicated in colony collapse syndrome.
ECN