Roundup is not that effective on cane berry growth in the spring. Fall is the ideal time. Other herbicides can be used in the spring to much greater effect. "Brush" killing herbicides containing triclopyr are often used for this task. Systemic herbicides can be effective for freshly cut stems and cut stumps; foliar applications are not the only method of application.

goats

Wild raspberry is one of the favorite berries of many different species of songbirds, so I only beat it back where it grows directly into my woodland paths. Every summer I enjoy the sight of birds feasting on the raspberries. Do consider relocating your trail around your raspberry patch or at least leaving some raspberries for the birds, and consider whether an aggressive herbicide program might harm the wildlife in your yard.

Well, I'm discouraged. I have a pretty powerful gas powered Stihl weed eater with a rotating blade. My goal - maintain a farmer's dirt road that runs between two stone walls. It hasn't been farmed since 1930 and we recently had the "pastures" logged. So the raspberries have taken over the newly sunny pastures and don't know that the road is off limits. The road is about 400 yards, so digging up the crowns is not an option. Wish me luck. At least there is no poison ivy (he said).

After clearing many areas here of wild blackberry canes, I've found the only way of keeping them out was to keep the area mowed. Where I can't mow, I weedeat.