Basswood Leaf Issue - Ask Extension
As soon as our basswood trees grow leaves, we get this milky white substance on the back that causes spotting and wilting as shown in the photos. The ...
Knowledgebase
Basswood Leaf Issue #876200
Asked July 07, 2024, 2:44 PM EDT
As soon as our basswood trees grow leaves, we get this milky white substance on the back that causes spotting and wilting as shown in the photos. The leaves are able to recover from the damage, but remain spotted all year. I've noticed other basswood trees in Bemidji with the same issue. Do you know what is causing this and how to mitigate? Thank you.
Beltrami County Minnesota
Expert Response
A sticky residue on the underside of leaves is usually a sign of mites or scale and leaf miner. The damage looks most like leaf miner. The resolution of the photo isn’t great enough to see a mite or scale but it is something you could do with a magnifying glass to rule out mites or scale.
Please see the link for a list of pests of basswood and treatment.
https://bygl.osu.edu/node/795
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/linden/leavesspots.html
https://www.uky.edu/Ag/Entomology/treepestguide/basswood.html
Please see the link for a list of pests of basswood and treatment.
https://bygl.osu.edu/node/795
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/linden/leavesspots.html
https://www.uky.edu/Ag/Entomology/treepestguide/basswood.html
