Willow Pinecone Gall

Pinecones on Willow? They're Baaack!

Willow Pinecone Galls are one of the most unusual galls found in Ohio; I post a BYGL Alert! about them every year. Maybe more than one to spread the gall-joy! The galls are created by the Willow Pinecone Gall Midge to house, nourish, and protect a single fly larva (maggot) located deep within the gall. The literature lists a number of willow hosts; however, I've only ever found them on black willow.
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Joe Boggs
Weird Willow Pinecone Galls and a Gall-Conversion! boggs.47 Sat, 02/11/2017 - 18:45
Winter walk reveals weird willow pinecone galls.
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Joe Boggs
Weird Willow Gall boggs.47 Mon, 07/18/2016 - 20:30

Arguably, one of the weirdest galls found in Ohio is produced on willow by the gall-midge, Rhabdophaga strobiloides (family Cecidomyiidae).  The gall's appearance isn't weird; it looks like a pine cone.  However, finding a "pine cone" on a willow is weird.  As the common name implies, the Willow Pinecone Gall, which is sometimes called the "pine cone willow gall," closely resembles a pine cone with closed seed scales.

 

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Joe Boggs