Diseased bush - Ask Extension
I’ve had these bushes for years and never saw this before. It’s like tiny little black seeds in surrounded in a web type substance. They are all o...
Knowledgebase
Diseased bush #755546
Asked June 11, 2021, 12:55 PM EDT
I’ve had these bushes for years and never saw this before. It’s like tiny little black seeds in surrounded in a web type substance. They are all over the tips of the branches. I’ve included a picture of the other one I have that is healthy. I don’t know the name. I was going to just cut it way back, or should I use a product?
Anoka County Minnesota
Expert Response
My guess would be webworms. Look at the webbing and see if you can see some insect larvae inside. The "black seeds" are frass from the larvae.
https://bygl.osu.edu/node/1062
http://hyg.ipm.illinois.edu/article.php?id=1022
Usually no treatment is necessary. You can just spray off the nest with a hose or prune them out.
https://bygl.osu.edu/node/1062
http://hyg.ipm.illinois.edu/article.php?id=1022
Usually no treatment is necessary. You can just spray off the nest with a hose or prune them out.
