Knowledgebase

Invasive Weed #877896

Asked July 19, 2024, 10:36 AM EDT

Residents of Manistee County came into our office with a sample of these weeds, and a list of chemicals they have looked up. They want to know what is best for getting rid of this nuisance.

Manistee County Michigan

Expert Response

Hello
If client is asking about ID of the pink flowered plant, we need more info—
1. Where it is growing- in a moist or dry area; in shaded or full sun exposure?
2.Pictures of the leaves attached to the stems so we can see their shapes and how they are arranged on the stems.
3.A clear close up of the face of the flowers, so we can count the stamens in the center.
There are many possibilities- wild geranium or something in the gentian family.
I will watch for your update.

Grows in full sun, sandy Manistee township soil, will try again to attach more pictures 

The Question Asker Replied July 19, 2024, 12:35 PM EDT

More pictures not sure they went thru

The Question Asker Replied July 19, 2024, 12:45 PM EDT

Looking for the right chemical weed killer in our lawn grass. This flower weed has grown last year to most sunny spots in whole lawn area. 

The Question Asker Replied July 19, 2024, 1:31 PM EDT
Thank you for the additional photos. I believe this is a type of Silene species, perhaps Silene antirrhina.
https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Silene+antirrhina

Control of this plant may be similar to Silene latifolia:

“Cultivation or tillage during seedbed preparation will kill many white campion plants in the seedlilng stage. Well-established plants are usually not killed by tillage…To control an established population, you should focus on stopping seed production. Hand-pulling, mowing, or herbicide applications are effective. Hand-pulling should be conducted in early summer when the soil is moist, and you are able to pull out the entire root. Mowing is best done between the times that the flower buds begin to form until the flowers begin to open.

Herbicides that contain dicamba or metsulfuron-methyl are effective on campion. Consult the product label for directions on application rate and timing.” from Cornell Cooperative Extension

However, accurately counting the stamens, shape of the pistil and corolla, and pegaps looking at some seeds, are needed to confirm ID.
Please submit your photos to MSU Plant Diagnostic lab, along with the other info - where and how it grows— to confirm the identification by a weed specialist. Their email is <personal data hidden>

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