Leafspot on winter wheat, what is the pathogen?
Wheat Moscow
Winter wheat, previous crop - wheat. White leafspot, oval in shape, with dark margins are common on 70% of plants. Unfortunately, I have no samples to do microscopic analysis or isolate the pathogen.
Wheat, Krasnodar, Russia, April 2017
Posted
by: alex ignatov
(1 point)
Posted: April 1, 2017
Answers
Hi Alex, agree the spots are not clearly visible, but they do resemble like herbicide damage. Did they spray any herbicide in the field?
http://www.mississippi-crops.com/2015...
http://www.deltafarmpress.com/wheat/w...
http://blogs.oregonstate.edu/bomingsb...
http://www.mississippi-crops.com/2015...
http://www.deltafarmpress.com/wheat/w...
http://blogs.oregonstate.edu/bomingsb...
Herbicide drift/injury
Herbicide Aim (Carfentrazone) damage
Gramoxone drift damage on wheat leaves
Herbicide damage on barley leaves
Herbicide damage
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: April 4, 2017
alex ignatov commented,
Ravishankar, many thanks for idea! I have asked Syngenta people for better pictures. about 7 years ago.
Ravishankar, many thanks for idea! I have asked Syngenta people for better pictures. about 7 years ago.
Posted
by: alex ignatov
(1 point)
Posted: April 5, 2017
please can you help me about more information of fall army worm
Posted
by: hodan
(1 point)
Posted: September 10, 2019
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Alex, is there a clearer image you could upload? Most of the spots are out of focus and a little hard to distinguish. Also, are the leaf spots flat or slightly 3-dimensional? Powdery mildew can leave white spots like these but typically does not have a dark margin about 7 years ago.