Collard plant has yellow brown leaves
Collard greens Kenya
My collards have got a brownish yellow colour on older leaves. What could be the reason?
Collard plant
Posted
by: Zackmatere
(1 point)
Posted: May 22, 2017
Answers
some leaf parts look like black rot/leaf blight caused by Xanthomonas bacteria. Can you cut leaf petioles - black vessels are typical symptom for this disease?
Posted
by: alex ignatov
(1 point)
Posted: May 22, 2017
Agree with Alex, it could be black rot disease. To confirm the disease, we request you do some tests like
1. Look for discoloration (black) of the vascular tissue of leaf petiole.
2. Or you can do ooze test by cutting the infected leaves into small bits and put into water in a glass tube, if it is bacterial disease you will see the streaming of bacteria (image attached for your reference).
1. Look for discoloration (black) of the vascular tissue of leaf petiole.
2. Or you can do ooze test by cutting the infected leaves into small bits and put into water in a glass tube, if it is bacterial disease you will see the streaming of bacteria (image attached for your reference).
Blackening of water-conducting tissues of the stem due to bacterial black rot
Symptoms of black rot on cabbage leaf
Bacterial streaming from cut tissue (ooze test)
Oozing of bacteria from infected tissue
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: May 22, 2017
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