Pitch the earlies, or persevere?
After five years of growing heirlooms without a hitch, it seems my tomato karma has turnedÂ I've had a dozen earlies out in WOW's for a few weeks (safe planting date is 5/10). Our weather has been weird (hot/cold/hot). Yesterday was 85, but the forecast is for a cool weekend with lows in the upper 30's possible. I've been opening & closing the WOW accordingly. Yesterday I moved the WOW's off entirely because of the heat.
A few show signs of mild sunscald, which doesn't overly concern me. Two of the plants had what I believe is powdery mildew (not sure, never had it before, see pics) and the undersides of the leaves on the first plant were seriously purple (see the veins). I yanked those two plants, but I'm concerned for the others. Since it's still early enough in the season, I'm wondering if I should just pull all the early plants and start over. The plants that are hardening off properly under the carport look fine.
Questions: If this is powdery mildew, is the probable cause too much humidity in the WOW's or something in the soil? I did add some compost from the city center that may be suspect. Since I removed the two plants showing signs, will I be safe treating the rest with a fungicide? I'll be planting out my full crop next weekend. I'd like to stay organic, but I'm not opposed to some Daconil if the situation warrants it. I have the option to pull everything and start over, but I'd hate to lose the earlies... I had visions of a Sun Gold BLT on Memorial DayÂ
Any advice appreciated!