Is a disease affecting this vine?

Wine Making Talk

Help Support Wine Making Talk:

Ricjhill

Junior
Joined
Jul 25, 2017
Messages
5
Reaction score
0
Hi I've just undertaken to restore a vineyard which has not be maintained for over 10 years. There is a vine in there which is almost totally dead and I'm wondering what has caused it. As background , there's been an unseasonal amount of rain and high temperatures in between. The next two photos of discolored leaves are from otherwise healthy plants.

IMG_1391.jpg

IMG_1426.jpg

IMG_1425.jpg
 

balatonwine

The Verecund Vigneron
Joined
May 9, 2017
Messages
1,106
Reaction score
888
Location
Badacsony wine region. Hungary
Many different causes can give similar visual results. So diagnosis from a photo alone is not definitive. Given that disclaimer:

Photo 1: Not much information from dried leaves. It is possible that there was simply physical damage to the main trunk which killed the vine. If not, then sudden vine death in summer I usually would suspect a virus (e.g. fanleaf virus), viriod or bacteria (e.g. Pierce's disease).

Photo 2: Black rot?

Photo 3: I would say downy mildew (especially if you had a lot of rain).
 
Last edited:

Ricjhill

Junior
Joined
Jul 25, 2017
Messages
5
Reaction score
0
Thanks for the help.. the weathers been awful, you might have had the same as i not that far from you in Bratislava, i assume you are based near Lake Balaton
 

salcoco

Veteran Wine Maker
WMT Supporter
Joined
Jan 1, 2007
Messages
2,959
Reaction score
1,264
Location
Kansas
the second photo looks like a nutrient deficiency. have a soil sample done and then add amendments based on the recommendation.
 

Latest posts

Top