Goldenrod Bunch Gall

Goldenrods make up a good percentage of plants in my weed patch in our backyard. This summer many of them have this abnormal growth caused by a gall midge.

This growth is called a bunch gall, rosette gall or flower gall. It’s caused when a gall fly lays an egg in a leaf bud. After the egg hatches, the grub somehow keeps the stem from growing.

Obviously, the grub/gall doesn’t seem to affect the plant’s overall health.


4 responses to this post.

  1. Posted by Therese on September 12, 2012 at 7:01 pm

    AGAIN!!!! Something I didn’t know!


  2. I’m learning so much from your blog! 🙂


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