Need Help IDing Problem with Tomato Start Leaves
I am looking for some help with figuring out what is wrong with my tomato starts. They are about a month old and are in 2 inch pots. They are being raised indoors under lights and are being bottom watered. I can no find no sign of any major pest problem. They were looking wonderful until today I noticed several of them have developed some pretty bad looking areas on their leaves. The worst leaves have turned a blackish-grey color and become crispy. I'm including a photo. I have other tomato starts of different ages which are mostly fine, but a few are showing the same symptoms. Any help is greatly appreciated!