Do you know why my grape leaves are falling down?


Joined
Jul 13, 2018
Messages
3
Reaction score
0
Location
San Diego
Country
United States
My grape vine just celebrated her first birthday. She grew so much this spring and was looking gorgeous, then last week her leaves started turning yellow/brown and have dropped. Someone told me it looks like powdery mildew but the google images do not look the same to me. Can you identify the culprit?
 

Attachments

  • grape1.jpg
    grape1.jpg
    177.8 KB · Views: 249
  • grape2.jpg
    grape2.jpg
    213.6 KB · Views: 229
  • grape3.jpg
    grape3.jpg
    242.1 KB · Views: 247
Ad

Advertisements

Joined
Feb 1, 2015
Messages
721
Reaction score
567
Location
Long Island, NY
Hardiness Zone
7a
Country
United States
All the leaves above the trellis look fine. My guess is it's dropping lower leaves to save energy for the new growth above. I'm not seeing any powdery mildew either.
 
Joined
Jul 13, 2018
Messages
3
Reaction score
0
Location
San Diego
Country
United States
It started growing late April and was that big by May. All of the leaves were green up until it got really hot. So could it be they fell off so quickly to conserve the top?
 
Ad

Advertisements

Joined
Feb 2, 2014
Messages
9,502
Reaction score
4,423
Location
Tarpley Tx
Hardiness Zone
8b
Country
United States
My grape vine just celebrated her first birthday. She grew so much this spring and was looking gorgeous, then last week her leaves started turning yellow/brown and have dropped. Someone told me it looks like powdery mildew but the google images do not look the same to me. Can you identify the culprit?
It looks just like spider mite damage to me. In fact on the last picture I can see what appears to be a spider mite web attached to a dead leaf and a green leaf. Cut off all of dead and even slightly affected leaves and start a spray regimen of Neem oil. Use a spinosad based insecticide as a soil drench too. Use the Neem spray every 4-6 days for a month. The soil drench once. The reason for spraying so much is that spider mites have a very fast and complicated reproductive procedure and it will take this long to completely stop it.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top