What's happening in the field?

At the Missouri State Fruit Experiment Station

Anthracnose on grapevine

by

One of the F1 hybrids in Dr. Hwang’s vineyard showed symptoms of anthracnose. Anthracnose is a fungal disease that we do not frequently see at the experiment station since we apply a delayed dormant spray of Sulforix or lime sulfur.  Here are some photos of the problem.

"Birds-eye" lesion is evident on the berries.
“Birds-eye” lesion is evident on the berries.

 

Here is a close up of the lesion on the fruit.
Here is a close up of the lesion on the fruit.

 

Lesions on the rachis of the cluster.
Lesions on the rachis of the cluster.

 

Close-up of a stem lesion that almost girdles the shoot.
Close-up of a stem lesion that almost girdles the shoot.

 

Close-up of a single stem lesion.
Close-up of a single stem lesion.

 

Anthracnose stem lesions on grape.
Anthracnose stem lesions on grape.

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