Currently viewing the category: "Galls"

Backyard Something
This is attached to a lower branch of an oak tree in our backyard! Any ideas to what it may be? We live in Georgia near Atlanta.
Ralph W Sarc

Hi Ralph,
This is the second letter today requesting an ID for the Wool Sower Gall. We were sad the first had no photo and then we opened your letter. The Wool Sower Gall which is produced by a tiny wasp, Callirhytis seminator. Galls are growths on various parts of plants, usually caused by a Gall Wasp or a type of mite. There are many species of Gall Wasps, and each has a specific host plant. The oak tree is the host plant for the Wool Sower Gall.

egg?
Cool website! My boys found this in Sedona, Arizona. It is attached to the leaf. Is it an egg?
Thanks,
Pinkie
Charlotte, NC

Hi Pinkie,
This is some type of Gall, but we are not sure what. Galls are growths produced on plant leaves, stems and other parts by usually wasps, flies and moths. They are not harmful to the plant. Inside the Gall, young insects are developing, so it is akin to an egg. The gall is usually very plant host specific. A quick internet search did not identify your particular Gall, but in time, we might have a more conclusive answer.

Hello,
There is a baseball size cocoon hanging from a maple tree in my yard. It’s white with prickly looking brown things sticking out from it. I really did think it was a baseball for the longest time as I looked at it from my kitchen window. But upon further inspection it’s a cocoon. I’ll take a photo of it and send it along if you’d like me to. After searching the web I can’t figure out what type of cocoon it is. Can you help?
Thanks so much
Julie Worthy

Hi Julie,
You have a Wool Sower Gall which is produced by a tiny wasp, Callirhytis seminator. Galls are growths on various parts of plants, usually caused by a Gall Wasp or a type of mite. There are many species of Gall Wasps, and each has a specific host plant. The Wool Sower Gall used the oak tree, not a maple as a host. Your photo is of an oak tree. Here is a site with additional information.

thanks so much. you can see how much i know about trees from getting the type of tree incorrect. i’m just glad to know millions upon millions of spiders or something like that will not emerge come summer. thanks for your help. i love being able to get information from others on the web who are experts like yourself.
sincerely,
Julie Worthy