robbieee said:
If u have something constructive to post fair enough. But u don't. So please don't post on this topic. I have already stated cutting back or killing weeds isn't a problem on this bit of land!!
End of!
End of nothing. It was suggested to you that you use weedkiller and you followed up by asking if it would be effective on particular types of plants. As part of that exchange, I explained that using weedkiller on someone else's land is a criminal act. If someone suggested a course of action to me and someone else explained that it's illegal, I'd be grateful for the heads up.
Unless you have the permission of the owner of the land, cutting back or killing weeds is a problem. I'm not sure why you're here asking the question since you already seem to have decided what you intend doing.
And, just for the record

, I suggested a barrier solution and approaching the owner of the land. All of the above are constructive, so enough already with the attitude. There are other constructive and legal options, but hey, you want to use weedkiller so fill your boots!