Curling and puckering collard green leaves (also seen on Red Russian Kale and Swiss Chard)
After about a month of excellent production, the new leaves on my three collard green plants are curling and puckering. It definitely starts in the center with new growth. I did not see any obvious pests. There is some sort of brownish rot in the center, which you can see in the second picture. I have similar symptoms on Red Russian Kale and Swiss Chard in other beds. I am considering trying a neem oil spray in case there are aphids. My research is not turning up examples of this symptom. I saw something similar on kale last year. I am located in Chicago, IL. Thanks for any advice!
Brownish rot/disease/damage around the center/new growth
Distortion of new Collard Green leaves