There are multiple ways to prune grapevines. Some recommend pruning down to leave only two buds per vine shoot, which will be where next year's growth will be. This method is great for wine grapes and encourage grapes for next year. Plenty of Youtube videos on it. However, Thompson Seedless do not respond well to this method. They will grow fantastic folliage, as you've seen, but will not produce much in the way of grapes. There is another method for pruning these. I believe it is called caning. Basically, from the trunk you count out the lateral runner (assuming you have it on a wire) and prune everything beyond the 3rd or 4th rising cane. You decide where based on the vigor of the rising cane. If the 3rd is vigorous, then it, if the 4th more so then it. If you end up messing up, you still have the 1st and 2nd to use. Once you have cut off the lateral, you then bend the rising cane down to the wire and tie it down to make a new lateral. Be gentle, and you may hear the wood crack a bit, but that should be ok. This is where the need for riser #1 and #2 may be necessary. Once you have it tied down, then prune the risers closer to the trunk as you would have the other method, leaving 2 buds. I couldn't find any videos on this, but if you search for grapevine pruning methods for Thompson grapes, you should find it. Apparently Thompson likes to put grapes on the vines from the upper buds only. Good luck! Dan

I've got wild grape growing up into some of my conifers in my woods. Can't be allowed to happen as they will grow so profusely as to shade out the underlying tree. So yes, cut and apply herbicide. If you are able to acquire the herbicide Garlon, that is a little more effective for this application than is Roundup. But......Roundup-style herbicides will do the trick. Are you making a strong solution? In the case of professional strength glyphosate (Roundup active ingredient) materials that I've used, the recommendation for this application is to mix the full-strength concentrate 50/50 with water. BTW, I think this problem is on the increase. My theory is that there have been some drought years, and that nothing, not even severe drought stops these vines. Hence, the poor growing conditions of recent years have given the wild grape a bit of an advantage. Not sure, just speculating. +oM

Beware of look-alike Moonseed which has a similar leaf and a single seed in the shape of a flat crescent on the inside of each fruit.

Grapes, wild or not, need a lot of sunlight to produce a crop of fruit. If you want this vine growing where it is there is no reason to not allow it to grow since a weed is a plant you do not want growing where you do not want it to grow.