, we have cut down and bull dozed 5 honey locust or black locust trees in order to build our home. Even before we did this, these trees always were throwing out new shoots. This behavior has only seemed to multiply with the trees gone. There are many, many large roots still left in the soil. How are we every going to stop these new shoots from popping up so we can plant a yard? We don't want to use chemicals, if possible. Will covering our planting areas with thick plastic stop them? Your help will be gratefully accepted! Thank you so much! Allene
Cut the suckers to 3-4”, making a more vertical cut to expose more cut surface. You can also peel back some bark to expose the green cambium. Paint the herbicide on very carefully with a disposable foam brush, applying it primarily to the cambium. Don’t get it on any surrounding plants. This is best done in the fall when the tree is not in active growth – in the spring when the sap is rising, it can carry the herbicide up and out of the cut surface before it has a chance to work. You may need to repeat this treatment for complete control.
This article, “Cut Stump Application of Herbicides to Manage Woody Vegetation”, has more information you may find useful. extension.arizona.edu/pubs/az1401.pdfAlso this site has more details: https://dnr.wi.gov/topic/Invasives/fact/BlackLocust.html