I have a lot of puncture vine i am trying to control. Roundup works well to kill the vine but it is a very prolific seed producer. The plant starts to bloom early so there is immature seed just a few days after germination. Roundup is absorbed through the leaves and translocated into the roots so it makes sense it will be translocated into the maturing seed as well. Dooes anyone know if the resulting mature seed will be viable or will the Roundup keep it from germinating?