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Curling and puckering collard green leaves (also seen on Red Russian Kale and Swiss Chard)

Collard greens    None Given

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!


Posted by: Jack Scott (1 point) Jack Scott
Posted: June 25, 2017

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I think it could be Swede midge damage. The insect feeds on cole crops resulting in corky brown scarring near leaf petioles. Also one may see twisted leaves and may also leads to emergence of multiple heads or stems.

http://msue.anr.msu.edu/news/southeas...


Posted by: Dr. Ravishankar Narayana (134 points) Dr. Ravishankar Narayana
Posted: June 30, 2017

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Jack Scott commented,
Thank you. I also saw another page that made me think it might be this pest, but I did not think it had made as far west as Chicago. But looking at the pictures on these pages, it sure looks like the same thing: http://www.omafra.gov.on.ca/english/c... http://msue.anr.msu.edu/news/swede_mi...
3 months ago.



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