Dodder can be a weed of native plants, ornamentals, and agricultural crops in Michigan. Legumes, bedding plants, nursery crops, and vegetables can serve as hosts for dodder. There are many different species of dodder, and many of these species are host-specific.

Control of dodder can be extremely difficult. This plant only reproduces by seed, so preventing further seed production is very important. Seed can remain dormant in the soil for up to 5 years. Seeds may be dispersed by a variety of means, such as birds, water, equipment, topsoil, mulch, and bedding plants. Preventing seed formation can be done by hand removal, burning, mowing, or herbicide application.

Hand removal may be appropriate depending on the size of the infestation. Detaching dodder from the host plant(s) may be difficult, and therefore that plant may need to be removed. Following removal, all plant material should be placed in a plastic trash bag for disposal or burned to avoid any additional seed being produced and dispersed.

Depending on the location of the infestation and any regulations in your area, burning may be an option for control. During burning, both the dodder and host tissue need to be destroyed to prevent regeneration of the dodder from tissue embedded within the host. Burning can destroy seed on the plant and on the soil surface, but may have variable control depending on the intensity of the fire.

Mowing can destroy both the dodder and host plant and reduce the infestation. Mowing will not destroy any seed that has been produced. Be sure that plants are mowed below the area where dodder has attached to the host.

Herbicides such as glyphosate and 2,4-d will kill dodder but will also kill the host plant. Remember to read and follow all instructions on the herbicide label if you choose to make an application.  Below is a link to an article with additional information.
The dodder you never wanted article