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

Grape phenology and GDD accumulation

GDD base 50 accumulated since April 1 = 2964
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 chemistry

The juice analysis of the berry samples collected this morning is as follows:

5-Sep-14
Cultivar ˚Brix pH TA g/100ml
Catawba R 19.1 3.19 0.987
Catawba W 17.4 3.13 1.219
Chambourcin F 21.1 3.13 0.893
Chambourcin M 21.2 3.23 0.846
Norton F 21.6 3.17 1.080
Norton NN 20.5 3.18 1.433
Norton NS 20.3 3.15 1.448
Norton R 21.0 3.20 1.403

 

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Grape phenology and GDD accumulation

GDD base 50 accumulated since April 1 = 2831
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 phenology and GDD accumulation

GDD base 50 accumulated since April 1 = 2605
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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Ningxia scouting party

The instructor and students from the Ningxia University wine program in China scouted the vineyards this morning for pests, diseases and other problems. We found many different things including sour rot with spotted wing drosophila, Grapevine Vein Clearing Virus, phylloxera, Japanese beetle, downy mildew as well as two other rots that we tentatively think are ripe rot and bitter rot.

The instructor and students identify the various bunch rots they collected.
The instructor and students identify the various bunch rots they collected.
Leann Hubbard, a graduate student in Dr. Wenping Qiu's lab, helped us identify GVCV virus collected from Chardonel.
Leann Hubbert, a graduate student in Dr. Wenping Qiu’s lab, helped us identify GVCV virus collected from Chardonel.
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