cottonwood tree florlt
Will florelt stop the production of cotton on female trees ?
Rosebud County Montana
There have been some studies that show good response to using synthetic ethephon (the active ingredient in Florel) to reduce the cotton on the cottonwood trees. You would likely want to hire an arborist depending on the size of the tree and keep timing in mind. The tree likely will need to be sprayed just at bud break to be effective.
Here is the Florel Label. Information about Cottonwoods are on page 5 of 6 (just so you know proper application and timing):