Missouri State University
What's happening in the field?
At the Missouri State Fruit Experiment Station

Cayuga White kicks off grape harvest at the station

We are harvesting Cayuga White today. The winery plans to make distilled grape spirits from this cultivar as well as Chardonel and Seyval Blanc. We will try to harvest all cultivars today since we have a large crew. After the Chinese interns return home at the end of the week and much of our crew will go back to school, our crew will shrink considerably!

We have a large harvest crew today, so we hope to harvest three different cultivars.
We have a large harvest crew today, so we hope to harvest three different cultivars.
Rachel carries up some lugs.
Rachel carries up some lugs.
Phoebe has taken care of the Cayuga White as part of her internship.
Phoebe has taken care of the Cayuga White as part of her internship.
Terry is also happy to participate in the harvest.
Terry is also interested in how his management work this year led to a good harvest.
Minna carefully removed any rot from the cluster.
Minna carefully removed any rot from the cluster.
Edward worked on the green drop in the Cayuga White just before harvest.
Edward worked on the green drop in the Cayuga White just before harvest.
Harvest goes smoothly even though it is hot weather!
Harvest goes smoothly even though it is hot weather!
We must be getting close to finish since this fellow is smiling!
We must be getting close to finish since this fellow is smiling!
We pick up the lugs in the Kabota to take them to the sales dock to weigh and put in the cooler.
We pick up the lugs in the Kabota to take them to the sales dock to weigh and put in the cooler.
The lugs weigh about 20 - 25 pounds each. We are careful not to fill them too much since we do not want to crush the grapes just yet.
The lugs weigh about 20 – 25 pounds each. We are careful not to fill them too much since we do not want to crush the grapes just yet.
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Grape phenology and GDD accumulation

GDD base 50 accumulation count beginning April 1 = 2354  http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

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Grape juice analysis

Here are the grape juice analysis results from the berry samples collected this morning.

5-Aug-16
Cultivar ˚Brix pH TA  g/100ml
Arandel NWV 17.5 3.16 1.422
Aromella NWV 14.6 2.97 1.264
Cayuga White 16.6 2.99 1.005
Chardonel F 16.9 2.91 1.560
Chardonel NWV 18.9 3.03 1.320
Delaware 17.3 3.01 1.238
Seyval Blanc 18.3 3.08 1.043
Vignoles 18.0 3.01 1.621

 

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Grape phenology and GDD accumulation

GDD base 50 accumulation count beginning April 1 = 2162  http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

Xiangqing (Mina) Tang, Suo (Phoebe) Dong, Zhong (Edward) Zhang, and Hongrui (Terry) Wang recorded phenology today as they did last week.

 

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Grape phenology and GDD accumulation

GDD base 50 accumulation count beginning April 1 = 2017  http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

Special thanks to our group of Chinese student interns – Xiangqing (Mina) Tang, Suo (Phoebe) Dong, Zhong (Edward) Zhang, and Hongrui (Terry) Wang – for recording phenology today!

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Botrytis it is

We placed a sample of the blossom blight symptom collected from the high tunnel raspberries on July 15th in a plastic bag with a moist paper towel in it. Today we saw the grayish mycelium or fungal strands indicating the blight is caused by Botrytis or gray mold. This is the first time we have seen this problem in the high tunnel, but weather had been wet and overcast and we put shadecloth (47%) on the tunnel in early July which may have helped create conditions favoring Botrytis development. We will add Elevate,  a botrycide, to the spray for SWD and hope to solve this problem.

Botrytis gray mold grew on the blighted blossom when placed on a moist paper towel and sealed in a plastic  bag.
Botrytis gray mold grew on the blighted blossom when placed on a moist paper towel and sealed in a plastic bag.
Here is a closeup of the Botrytis mycelium.
Here is a closeup of the Botrytis mycelium.
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Grape phenology and GDD accumulation

GDD base 50 accumulation count beginning April 1 = 1765  http://agebb.missouri.edu/weather/reports/gddTable.asp
Phenology stages according to the Modified E-L system http://door.uwex.edu/files/2010/10/ModifiedEichhornLorennzsystem.pdf

Posted in Grapes, Phenology | Leave a comment