My family bought four acres of land and a new building for our company in a place in upstate New York which is in zone 4. I had opportunity to rent a tractor and so plowed half an acre and planted pumpkins, watermelon and corn all within a field roughly 1/4 of an acre. My mounds of pumpkins are being overgrown very rapidly by these insane weeds everywhere. Is there anything I can apply to the field which will kill the weeds and not harm my pumpkins? Some of them will be used for cooking in the autumn. Also, I got a late start in the growing season and did not plant the seeds for everything until June 14. Right now, the pumpkins are big pplants with yellow flowers but have not really started vining out. Is it possible I can take care of these weeds? Will I even get to see pumpkins this Fall?