Knowledgebase
Willow Leaf Beetle Infestation #870336
Asked May 27, 2024, 8:57 PM EDT
Dakota County Minnesota
Expert Response
http://cues.cfans.umn.edu/old/Web/154ImportedWillowLeafBeetle.pdf
https://bygl.osu.edu/node/405
https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/ENTO/ENTO-139/ENTO-417.pdf
https://ecommons.cornell.edu/server/api/core/bitstreams/ab4837fa-a8b3-4496-8dc3-8851da40f406/content
A tree will tolerate loosing all its leaves or having the chlorophyll stripped off for 2 years in a row but if it happens a third year the trees health will be impacted. Spraying a tree as large as yours will require a tree service. Spraying is rarely necessary. Bt is safe for use near or in a garden. Hopefully the information from the links will help you decide what should be done.