A few hours of focused work with the right tools can have the big results as seen in the kill off of these huge kudzu vines near Glen Echo, MD.
Excellent Resources for Identification and Eradication
Missouri Department of Conservation List of Invasive Plants and their Control
A foldable pocket saw, clippers, gloves, and a long-handled lopper are the basic tools. Prybars pull large English ivy vines off a tree's trunk so they can be cut.
An electric chain saw hits big vines and bushes. The hedge trimmer soars through heavy infestations of multiflora rose and masses of small vines such as kudzu.
Herbicide use should minimal but at times is essential. Its effective for infestations of porcelain berry seedlings and multiflora rose. Treat fresh cut stumps of vines and plants to kill roots with concentrated glyphosate from a "buckthorn blaster" or drops dripped from a quart sprayer.
English ivy forms massive carpets that slowly kill trees and native undergrowth. SEE https://hgic.clemson.edu/factsheet/english-ivy-control/
Expose all the vines with a downward sweep of your pocket saw to remove leaves. Pry vines from the tree trunk to cut. Crowbar helps. Vines form a network so all must be cut.
Cut and remove sections of vines close to ground. Pull up small vines. Cut-stem treat larger vine stumps to stop regrowth.
Porcelain Berry forms great hanging curtains that slowly kill trees and smother ground vegetation.
Porcelain berry looks very similar to native grape vines but berries are distinct and vines have a white core while grape is dark brown.
Cut hanging vines at the base and head high to clear trees. Large vine roots are killed with cut-stem treatment.
Vines produce thousands of seedling. Seedlings and light ground cover are readily killed when point sprayed with 2% triclopyr.
The "Devil's Weed" is extremely hard to remove due to its extraordinarily robust root system.
Grows up to 10 ft in dense masses that kill all vegetation beneath it.
Cut in summer, spray regrowth in fall with 5% glyphosate
https://www.nps.gov/articles/netn-species-spotlight-japanese-knotweed.htm
Grows extremely fast as it smothers trees and ground cover.
Kudzu is not easy to remove, but persistent treatment will kill it.
Kudzu
An immense spread of kudzu is basically one plant that has spread with lengthy, quick growing runners. A tap root can produce 20 runners many yards long.
Cut Kudzu vines and runners at the base root and cut-stem treat any time of year. Ground foliage can be sprayed with 2% triclopyr after June.
Rose stems branching from the base grow into immense, dense thickets of sharp thorns.
These thorns are really nasty.
Small plants filling a woodland are removed by spot spraying with triclopyr.
For large plants, cut back branches with a hedge trimmer and then cut-stem treat the stumps with glyphosate. Watch out for those thorns!