The first step is to inspect plants regularly and to remove any dodder seedlings that are seen. If the parasite is discovered after its roots have died, its stems should be removed by hand to prevent the distribution of its seeds. Unfortunately, while this may reduce the spread of the infestation, it won’t remove it. The haustoria inside the host plant can produce new dodder plants. This means that the host may have to be removed in order to remove the dodder. Cutting some plants to a point below the dodder attachment area, such as by mowing or pruning, may save them.
It may take persistent treatment in more than one year to completely remove dodder, since its seeds are easily spread from one place to another. If the parasite keeps on returning to an area despite a person’s best efforts, it might be necessary to apply a pre-emergent pesticide to soil to stop seeds from germinating and seedlings from emerging. A plant nursery or other source of pesticide information should be consulted about the choice of an effective herbicide and its safe use. The use of a pesticide should never be taken lightly. In a garden instead of an agricultural area, a herbicide probably won't be needed.