Damaged lettuce

Lettuce    ecuador

I found this symptoms on lettuce leaves both young and old ones, are starting to become necrotic with a grey/brownish color, as if they've been burned and turned to ashes. The whole area have this symptom. I think this could be some kind of toxicity (maybe ammonia?) but not sure. It is causing serious loses to the farmer.

Posted by: Carlos Hidalgo (1 point) Carlos Hidalgo
Posted: August 9, 2016

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