Controlling Cuscuta (Dodder) Infestations

As the webmaster of the Parasitic Plant Connection, one of the most frequent inquiries I receive from the general public concerns controlling dodder. I am not an agronomist or plant pathologist, therefore I can only provide you information (Table 11.3) I have about chemical control of Cuscuta derived from a chapter on that topic in the following book:

Eplee, R. E. and R. Norris. 1995. Control of parasitic weeds. In M. C. Press and
J. D. Graves [eds.], Parasitic Plants, 256-278 Chapman and Hall, London.

 Soil applied (for various hosts)  chlorpropham
 alfalfa  DCPA and pronamide
 lucerne  chlorthaldimethyl trifluralin
 tomatoes, ornamentals  DCPA
 ornamentals, blueberries  dichlobenil
 sugar beets  ethofumesate
 tomatoes  CDEC
 carrot, chickpea  chlorthaldimethyl
 onion, carrot pendimethalin 
 soybean  butralin
 chickpea, sugar beet, cranberry  pronamide
 alfalfa  paraquat, diquat, dinoseb, DNOC, glyphosate
 lucerne  glyphosate
 host denial  diuron, methribuzin, simazine, terbacil

Before applying any herbicides, I strongly suggest you get a copy of this book and read this chapter. The original table (11.3) contains bibliographic references to each of these host/herbicide combinations. I also think there are some good web sites to check out for control of dodder such as: This site is specific to California.

SIUC / College of Science / Parasitic Plant Connection / Cuscutaceae
Last updated:01-Oct-05 / dln