Elm Sack Galls

Aphid Galls Rising on Elms: True Identity Update boggs.47@osu.edu Fri, 05/29/2020 - 17:39
I identified the culprit behind the elm sack galls pictured in the BYGL Alert posted yesterday as the aphid, Tetraneura ulmi. However, thanks to input from Dan Potter (University of Kentucky, Entomology), I learned that the true identity is actually another closely related elm gall-making aphid, T. nigriabdominalis.
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Joe Boggs
Aphid Galls Rising on Elms boggs.47@osu.edu Thu, 05/28/2020 - 18:56
The leaves of native elms can look a bit bedraggled at this time of the year owing to the rise of pouch-like elm sack galls and the descriptively named elm cockscomb galls. Fortunately, neither of these aphid galls produce significant injury to the overall health of their elm tree host. Unfortunately, these odd-looking plant structures can spoil the aesthetics of their deep green elm leaf platforms.
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Joe Boggs
Bedraggled Elms: Galling Conditions boggs.47@osu.edu Fri, 05/31/2019 - 11:54
The leaves of native elms can look a bit bedraggled at this time of the year owing to rise of pouch-like elm sack galls and the descriptively named elm cockscomb galls. Fortunately, neither of these aphid galls produce significant injury to the overall health of their elm tree host. Unfortunately, these odd looking plant structures can spoil the aesthetics of their deep green elm leaf platforms.
Published on
Authors
Joe Boggs