I had a very good start in one of our seed beds of squash and zucchini, until 2 weeks ago when blossoms began to wilt and die and leaves began to turn yellow, then brown, then dead. Doing research I read that soil diseases are tough to deal with and clean up for any future plantings. I used an omri certified product called Regalia, a fungicide, which also had a soil drench program for certain types of soil diseases that my plants symptomology was exhibiting. The short term results have been promising, just the long term results have yet to be determined. Stay tuned!