Hello, I have a partially wooded hillside yard near Lebanon Hills in Dakota county that I have been clearing of buckthorn over the past two years. Unfortunately, I've seen garlic mustard, daylilies, and a few other aggressive species pop up into this newly cleared area. Because the hill is fairly steep I've been cutting the buckthorns down then going back in several times a week to cut back new growth - I was initially concerned about unnecessary herbicide use... but I see why they're often recommended for buckthorn. What is the recommended means of clearing out this growth while limiting erosion?