I have English ivy around my house, which isn't quite as invasive as kudzu, but still a major nuisance.
Roundup does basically nothing. The leaves are thick and waxy and so don't absorb herbicide effectively. Supposedly, applying a more concentrated formula on a weekly basis for a month can work, but I don't like the idea of spraying that much glyphosate.
If you have to use poison you can use way less by pruning and putting a dab of glyphosate on the stump. Even dishsoap straight to the vascular system will kill many plants.
I just mow it so I can see the vines and then pull them up and cut them. Over the course of the summer, I cleared a significant part of my land. Now that autumn weather has finally arrived, I should be able to get it all.
You can use ammonium sulfate as a surfactant to cut through English ivy with glyphosate. It works great, and in theory you don't have to use as much Roundup that way either.
This is the only way I was ever able to kill English ivy in the back yard of my old house. I bought glyphosate concentrate, some disposable plastic cups, and a disposable foam paintbrush. I painted it on every damned leaf in the yard.
It works. It may take several applications to do so, but it works.
Top tip. Rubber gloves with some woollen gloves over the top. Soak the woollen gloves in glyphosate and then you can lovingly stroke the plants you want to kill. It’s a bit quicker
Roundup does basically nothing. The leaves are thick and waxy and so don't absorb herbicide effectively. Supposedly, applying a more concentrated formula on a weekly basis for a month can work, but I don't like the idea of spraying that much glyphosate.