Controlling English ivy
Removing as much of the vine as possible by hand will help all control efforts. You may be interested in this fact sheet:http://extension.oregonstate.edu/yamhill/sites/default/files/Ivy_Removal_Fact_Sheet.pdf- English ivy can be a very aggressive pest and we appreciate your wanting to protect your existing landscape by ridding it of this invasive.
"Manual, mechanical and chemical control methods are all effective in removing and killing English ivy. Employing a combination of methods often yields the best results and may reduce potential impacts to native plants, animals and people. The method you select depends on the extent and type of infestation, the amount of native vegetation on the site, and the time, labor and other resources available to you. Whenever possible and especially for vines climbing up trees or buildings, a combination of cutting followed by application of concentrated systemic herbicide to rooted, living cut surfaces is likely to be the most effective approach. Along the base of trees, cut all stems about 4-6 inches above the ground and apply an herbicide with the active ingredient Triclopyr to the cut surface on the ground. Be sure to cut all stems with ivy growing up the tree. The ivy in the trees should wither and die and will then fall from the tree or can be pulled down by hand. On the ground. application of an herbicide with the active ingredient Triclopyr or Glyphosate will help control ivy. Look for the highest concentrations of active ingredient on product labels. These active ingredients come under several brand names, including Brush B Gone for Triclopyr and Roundup for Glyphosate. It takes about a week to see the full effects of these herbicides and you will likely have to repeat applications over time to gain satisfactory control of the ivy. With any herbicide, read and follow the label instructions carefully. The evergreen nature of English ivy means that it continues to grow through the winter months although at a reduced rate. Herbicide applications can be made any time of year as long as temperatures are above 55 or 60 degrees Fahrenheit for several days and rain is not expected for at least 24 hours. Repeated treatments are likely to be needed. Follow-up monitoring should be conducted to ensure effective control. Herbicidal contact with desirable plants should always be avoided. I'm not aware of any native plantings you could use to choke out the ivy, although you should plant something else after the ivy is effectively eradicated. Once well established, alternative groundcovers can help reduce the regrowth of the ivy. Mulching will reduce regrowth but likely won't be totally effective. Be vigilant and treat any regrowth as soon as it appears. Eventually you can "starve" the ivy roots, but it will take some time and quite a bit of effort. Once you've pulled and dug as much as possible, spot-treating regrowth with one of the recommended herbicides shouldn't negatively effect your other landscaping. Two good OSU Extension publications you may find useful are: Invasive Weeds in Forest Land - English Ivy - extension.oregonstate.edu/catalog/pdf/ec/ec1595-e.pdf Fact Sheet on Ivy Removal in a Home Landscape -http://extension.oregonstate.edu/yamhill/sites/default/files/Ivy_Removal_Fact_Sheet.pdf