I have a chain link fence that runs along the south side of our
property. I sprayed the grass with roundup, in order to do some sort of
slightly raised bed there and grow something. My original thought was
something like rhubarb, but then I thought perhaps vine crops?

One section will have purple morning glory, but the rest I think
could be various vine crops, such as squash, cucumbers, maybe even a
pumpkin?

I've grown some in the past, and had them destroyed by squash vine
borers. Another year my gourds were destroyed by downy mildew.

Can anyone suggest varieties of any vine crop that might be resistant
to both of these problems? I had heard they were genetically
engineering some vine crops that would kill squash vine borer larvae
about 4 years ago, but haven't heard yet whether they have successfully
incorporated this trait yet.

Thanks!