Good afternoon, I thank you in advance for your help. I am growing a sugar cube cantalope in 7 gallon grow bag using Scott's potting soil. I'm growing another one in ground in a different area that's doing great. The last few weeks I've noticed some left spotting not too bad but over the last few days it has gotten progressively worse. A lot of leaves get these spots & the entire leaf will turn a pale yellow like it's nitrogen deficient. I use compost, blood & bone meal at planting time. They have all been given fish emulsion too. I grow lots of tomatoes, strawberries herbs, & flowers also. I've not seen any pests on this plant but have seen many bees, praying mantis, etc..I live in crisfield we've had quite a bit of rain, maybe that made it worse?? I've googled til my fingers hurt. I can't tell if it's DM, PM, leaf blight? I'd like to know how to best treat it. I don't like to use general pesticides or just randomly treat. I have tried baking soda spray at 1 Tbspn per gallon then moved up to 2. Problem has just gotten worse. Any help / advice u can give is greatly appreciated. Thank you, Lisa D.