How do I get rid of a large amount of wild roses
Douglas County Colorado
Thanks for your question. In searching for an answer for you I wasn't able to find anything through our CSU extension publications, however, I did find this answer from the University of Illinois extension. Hope this helps:
"If the wild roses are multiflora rose, they can be very difficult to get rid of. Research in the midwest suggests that repeated mowing or cane removal by pruning 3-4 times a season will kill multiflora rose. This may take 2-4 years, depending on the maturity of the plants.... A round-up type of product is often used to treat the cut stubs after being mowed or pruned."
Your main problem will be with shoots coming up from the roots. The repeated pruning of these will cause the plant to not be able to photosynthesize and eventually you'll be rid of them.