Grape disease diagnostic
Grape
Syria
Hello,
I am a new grape farmer, And I need help to diagnose my grape disease, The following symptoms are visible, it is bunch closure time in our region,:
Stunted growth, short shoots compared to healthy vines and smaller leaves
Chlorotic leaves
Some fan shaped leaves(i might be mistaken) and some cupped leaves
Cracked berries ,
Red to Purple color on the cracks
Brown mildew like infection on berry skin
Brown mildew on shoot base
I posted pictures of the symptoms, i hope you can advise me if it is one or multipple diseases and what are they?
This might be not a disease and caused by birds or other natural events, please advise me
Best regards
A) fan shape leaf
D) cracked berries
E) fungus like infection on shoot base
B) cupped leaves
E) mildew on berries
C) necrotic spots
D) different size berries
Images A and B are herbicide injury of some sort. What herbicides were applied in the vineyard? Necrotic spots in C could be spray burn or a leafminer insect. If the latter, you should be able to see the larva inside the lesion if you hold it up to the light. E does not look like mildew, it might be thrips injury. The fungus on shoot just looks normal to me but maybe thrips? I have no idea about the berry splitting but if there is a lot of herbicide drift or other injury to the berries when they are small, as they start to grow near harvest, they may split along the injuries. Sorry I can't be more help with the last bit. over 5 years ago.
Hello,
Thank you for your help I appreciate it.
All the leaves on the vine are small comapared with others healthy vines,
The shoots are also very short,
most of the leaves looks normal but small,
and some of them look like the ones shown in Images A and B.
Could herbicide damage have such symptoms?
over 5 years ago.
Has anyone used herbicide near these grapes? Also, do you see an increase of decrease in symptoms? over 5 years ago.
Hello David,
glyphosphate herbicide was used in the field,
only few leaves are showing the symptoms of images A and B.
The rest of the leaves are very small in size compared with healthy vines.
other symptoms are small, stunted shoots.
There is no increase nor decrease in the symptoms.
Awaiting for your reply.
over 5 years ago.
Where are the healthy vines? In the same field? Go through your vineyard counting how many vines (if possible) and how many have small leaves. Do you see only small leaves on a few vines? Are they close to each other?
over 5 years ago.