Invasive insect on pear tree leaves - Ask Extension
There is an in
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Invasive insect on pear tree leaves #849541
Asked September 11, 2023, 8:06 PM EDT
There is an in
Multnomah County Oregon
Expert Response
Well, not an invasive insect but it is a new (invasive) fungal disease called Trellis Rust. I can see how you might think it an insect as it does build out from the leaf in a very strange way. Here is some more information on this disease: https://pnwhandbooks.org/plantdisease/host-disease/pear-pyrus-spp-trellis-rust-european-pear-rust
