Garden weed- Will RoundUp snuff it effectively? What I have is a nightmare of Multiflora Rose, pretty in good...

What I have is a nightmare of Multiflora Rose, pretty in good health established in our fund yard which is largely taken over by scrub trees. Clearing the manor is slow going because of the weed Multiflora Rose...so other than adjectives and re-cutting, will RoundUp kill this stuff rotten?
Should I spend the money? There's a ton of this weed, and I think it will steal a lot of any spray to wipe it out.
My croton requirements assist, please?
Answers:    I with the sole purpose had one plant and it took going on for 4 years to get rid of it by digging it up and using RoundUp.
What can I do in the region of...
is it a shrub, or a weed, Round up kill all green leafy plants, it doesnt work extraordinarily good on shrubs, check beside your nursery they can recommend something.