We had the best looking cucumbers growing and got 2 cukes off of it. Overnight the plant leaves turned yellow, got holes in them, black looking seeds, looked like white flies were coming out of the plants when we moved a leaf and now they are all dying and we have tried sevin dust, bug killer, soap mix and they are still dying and we are ready to pull them up. What has happened that quick and what can we do? Can we replant in the same spot? (wash tub) We have grown them in this way before and haven't had these problems before. HELP!!!!