New problems for my pecan plant?
Pecan None Given
Hi,
I'm from center Italy and I have two little grafted pecan plants of about 3 years old.
The Kiowa cultuvar plant has some strange black veins.
The main vain of some leaves blackened.
Someone can tell me what can it be?
The blue spots on the leaves are copper sprayed on nearby tomatoes plants.
I treated them with tebuconazole against scab because there are huge walnuts nearby, probably affected by scab.
I'm from center Italy and I have two little grafted pecan plants of about 3 years old.
The Kiowa cultuvar plant has some strange black veins.
The main vain of some leaves blackened.
Someone can tell me what can it be?
The blue spots on the leaves are copper sprayed on nearby tomatoes plants.
I treated them with tebuconazole against scab because there are huge walnuts nearby, probably affected by scab.
Posted
by: Mirko
(2 points)
Posted: August 8, 2016
Answers
Hi Mirko, It is very hard to diagnose the disease without seeing spores under microscope but according to your images it could be vein spot disease caused by Gnomonia nerviseda. It is mainly a foliar disease where the fungus attack vascular tissue at the junction of petiole to the rachis and base of rachis which results in blackening of veins and may cause early falling of leaves.
Vine spot disease on pecan leaves
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: August 9, 2016
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Probably it is the known scab or Gnomonia nerviseda as suggested by Dr. Ravishankar in another post. Can you confirm it? over 7 years ago.