Princeton elm leaf curl and gritty residue - Ask Extension
Hi,
Our Princeton elm has a fair number of curled knotty leaves which may have insects inside. A gritty, sand like residue is coating a yard table ...
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Princeton elm leaf curl and gritty residue #753921
Asked June 04, 2021, 9:42 AM EDT
Hi,
Our Princeton elm has a fair number of curled knotty leaves which may have insects inside. A gritty, sand like residue is coating a yard table under the tree and elsewhere. Ideas?
Thanks.
Hennepin County Minnesota
Expert Response
The knotted leaves are probably aphid domiciles. However, elms are susceptible to other insects that form leaf galls. Compare the affected leaves on your tree to those shown here:
https://images.app.goo.gl/9emSSRU21vwEqasv5
https://images.app.goo.gl/9emSSRU21vwEqasv5
The gritty deposits may be honeydew that has crystalized.
Go here to learn more about aphids on trees:
https://extension.sdstate.edu/aphids-trees
https://extension.colostate.edu/topic-areas/insects/aphids-on-shade-trees-and-ornamentals-5-511/
Thank you.
Sent from my iPad
Sent from my iPad
On Jun 5, 2021, at 4:29 PM, Ask Extension <<personal data hidden>> wrote:
