Weeping pussy willow

Asked March 30, 2018, 12:02 AM EDT

I have two weeping pussy willow trees in my yard. We just bought this property last year and so this is my first spring here. I noticed these bulbs (not the blossoms) on the branches and wondered what they are and what I should do, if anything. Thank you!

McLeod County Minnesota galls willow

1 Response

The growth on the stem is a gall caused by a midge (small flying insect), in this case, probably a willow beaked-gall midge (Rabdophaga rigidae). These galls usually do not affect the health of the plant so no control is needed.

Learn more here:
https://www.cambridge.org/core/journals/canadian-entomologist/article/life-history-and-habits-of-the...
https://bugguide.net/node/view/479817/bgimage