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White raised spots on Kale. Does anyone know what this is?

Kale    Colorado

This is Red Russian Kale grown hydroponically in an indoor system. Air temperature maintained at 70 Day/60 Night with ~75% humidity. These are showing up toward the bottom of our vertical growing columns so that may have something to do with it. Kale appears otherwise very health and all other plants are unaffected.

They are rubbery white raised leaf tissue. They do not "pop" nor do they rub off, they just appear to be malformations of the leaf. Any idea what could cause this?


Posted by: David (1 point) David
Posted: January 4, 2018

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Answers

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It could be galls formed by eriophyid mites. Normally galls are formed by mite feeding, resulting in increased production of growth hormones. The best way to identify the mites is by close examination of the underside of damaged leaves using a hand lens (10X or 20X) or microscope. It is also advisable to cut open the gall and examine. They mainly transmit through the wind.

http://www.missouribotanicalgarden.or...

http://www.missouribotanicalgarden.or...


Posted by: Dr. Ravishankar Narayana (134 points) Dr. Ravishankar Narayana
Posted: January 4, 2018

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