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At the Missouri State Fruit Experiment Station

Ningxia grape and wine students complete practicum at Mountain Grove

July 2, 2019 by Marilyn Odneal

Ten students from Ningxia University completed their practicum at the Mountain Grove Campus today. Activities included shoot positioning grapevines in the Genomics vineyard under the direction of Susanne Howard, training young Catawba vines, recording grape phenology, collecting disease and insect samples in the vineyard and looking at the problems under the microscope to verify identification, and measuring grape canopy density using point quadrat analysis.

Students shoot position the grapevines.
Susanne Howard discusses the reasons for shoot positioning.
Japanese beetles startled the students when they began working!

Japanese beetles were eating leaves and were difficult to work around.
Japanese beetles were eating leaves and were difficult to work around.
Grape developmental stages were recorded.
Grape developmental stages were recorded.
Training young Catawba vines.
It is important to train young grapes to a straight trunks.
The tubes protect the young vines from herbicide spray.
The tapener tools need some adjustment at time.
The group trained 100 plants in no time!
They did a great job!

Students looked at symptoms of phomopsis.
Several grape structures were investigated.
They found black rot symptoms and signs on a berry.

The student measure the grapevine canopies.
They put a dowel into the canopy.
Data is taken on the times the rod touches a leaf, cluster or a gap.
We measured seven different cultivars.
The students recorded 50 probes per cultivar.
The dowel is inserted every 6 inches when measuring a canopy.

After the point quadrat data was recorded, we did the calculations to develop a table that compared the grape canopies. The Foundation vineyard where the measurements were taken was planted in 2014.
After the point quadrat data was recorded, we did the calculations to develop a table that compared the grape canopies. The Foundation vineyard where the measurements were taken was planted in 2014.

 

Results from the canopy measurements taken July 2, 2019 in the Foundation Vineyard

Cultivar Leaf Layer Number %Gaps % internal leaves % internal cluster
Cayuga White 1.3 8% 13% 0
Chambourcin 1.36 10% 4% 3%
Chardonel 1.32 8% 3% 0
Norton 2.34 8% 29% 0
Traminette 1.94 8% 20.6% 0
Vidal Blanc 1.12 8% 1.8% 4.3%
Vignoles 1.56 16% 17.9% 0
IDEAL CANOPY 1.0 – 1.5 or less 20 – 40% < 10% < 40%

 

 

Filed Under: Grapes, Students

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