Treating rose of Sharon infestation - Ask Extension
Please identify from enclosed pictures what has infected my rose of Sharon and how to treat it
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Treating rose of Sharon infestation #836058
Asked June 16, 2023, 8:52 PM EDT
Please identify from enclosed pictures what has infected my rose of Sharon and how to treat it
Oakland County Michigan
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Hi Michael,
These are galls, caused by a small wasp or mites. It won’t affect the plant’s health and there’s no treatment to remove the galls.
Thank you for using Ask Extension,
Pam Voss
MSUE Master Gardener
These are galls, caused by a small wasp or mites. It won’t affect the plant’s health and there’s no treatment to remove the galls.
Thank you for using Ask Extension,
Pam Voss
MSUE Master Gardener
what can I expect for condition of my plant in the future . Will this be continual infestation or go away after this season. Just how do I manage the plant.?will it spread to other plants and trees in my yard?
Michael,
Galls are abnormal growths or swellings of plant tissue caused by an organism. Galls can form on both woody and herbaceous types of plants. Many types of plant galls are caused by mites and insects (wasp), although bacteria, fungi and viruses can also cause these strange growths to form. In many cases, galls form on the leaves of plants but occasionally twigs and branches can also be attacked.
While galls may appear threatening, based upon their appearance, most galls actually pose very little threat to overall tree health to try and chemically control it. Pesticide sprays would have had to have been applied earlier in the growing season prior to gall formation. And since many galls form on the leaves of deciduous plants, these leaves will fall off in autumn – giving tree leaves a “clean slate” to start off in the next growing season.
Galls are one of the more intriguing sides of nature to view and behold. They come in all shapes, sizes, colors and textures – truly one of nature’s more “artistic” flourishes!
For more information on galls, click on the link below.
Tree galls are rarely cause for concern - MSU Extension
Pam
Galls are abnormal growths or swellings of plant tissue caused by an organism. Galls can form on both woody and herbaceous types of plants. Many types of plant galls are caused by mites and insects (wasp), although bacteria, fungi and viruses can also cause these strange growths to form. In many cases, galls form on the leaves of plants but occasionally twigs and branches can also be attacked.
While galls may appear threatening, based upon their appearance, most galls actually pose very little threat to overall tree health to try and chemically control it. Pesticide sprays would have had to have been applied earlier in the growing season prior to gall formation. And since many galls form on the leaves of deciduous plants, these leaves will fall off in autumn – giving tree leaves a “clean slate” to start off in the next growing season.
Galls are one of the more intriguing sides of nature to view and behold. They come in all shapes, sizes, colors and textures – truly one of nature’s more “artistic” flourishes!
For more information on galls, click on the link below.
Tree galls are rarely cause for concern - MSU Extension
Pam
