Thank you both! It has been a cooler spring with more rain than usual, and overcast days. It could be either of those things. I will check for the bugs, though when I looked at them the day I noticed the problem, I didn't see anything except some young grasshoppers. I do know THEY can spread disease, so I wasn't sure if that was part of it. I'll look for the bugs, then see what I can do about the irrigation.
Thanks again!
J
