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

Symptom on Polka primocane bearing raspberry

We finished harvesting the primocane bearing raspberries in grow bags on October 31 for the trial funded by the USDA Specialty Crop Block Grant Program. We noted symptoms of a disorder on the Polka variety, but not on the other varieties in the trial (Josephine, Crimson Giant, Himbo Top, and Joan J.)

Dr. Courtney Weber, Associate Professor and Small Fruits Breeder at Cornell University – NYSAES was consulted about this problem and he mentioned that he had seen this before and it was fairly typical on the Polka variety later in the season. It may possibly be the natural senescence pattern of Polka leaves and does not seem to affect the long term performance of the plantings.

Leaf curl and discoloration of Polka raspberry at the end of the growing season October 30, 2014.
Leaf curl and discoloration of Polka raspberry at the end of the growing season October 30, 2014.
Top side of affected Polka leaf.
Top side of affected Polka leaf.
Underside of affected Polka leaf.
Underside of affected Polka leaf.

 

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Replacing missing grapevines

It is important to replace any missing vines in a vineyard so that you maintain maximum productivity. This morning, Ryan Wilson worked with Amanda Gonzales to the Foundation vineyard and note missing and weak grapevines. Ryan and Amanda are students working on their practicum requirements for VIN 111 in the Vesta Online Grape and Wine Program http://www.vesta-usa.org/.

In the afternoon, Ryan worked with Shelia Long, a field and maintenance employee at the State Fruit Experiment Station. Shelia and Ryan collected dormant hardwood cuttings of Vidal Blanc in the Virus Indexed Foundation Vineyard. The cuttings will be put in cold storage and then placed in rooting beds in January. These cuttings will be used to produce vines that will fill in missing spots in the vineyard.

They also selected and buried layers, long canes from a vine adjacent to an empty spot. Part of the cane is buried while still attached to the mother. The buried portion of the layer will root and next spring. The buds on the far side of the mother plant that come up out of the ground will break and grow a new vine next season. This strategy can be used to fill empty places in vineyard where vines are own rooted.

Ryan Wilson and Shelia Long collect dormant hardwood cuttings of Vidal Blanc grapevine to use to plant in locations where plants are missing.
Ryan Wilson and Shelia Long collect dormant hardwood cuttings of Vidal Blanc grapevine to use to plant in locations where plants are missing.
Shelia chooses a long cane from a vine adjacent a miss and tags it with yellow flag.
Shelia chooses a long cane from a vine adjacent a miss to use as a layer and tags it with yellow flag.
A hole is dug where the vine needs to be replaced and the layer is bent down and set in the hole. There are buds on the far side of the cane that come up out of the ground opposite the mother vine.
A hole is dug where the vine needs to be replaced and the layer is bent down and set in the hole. Note the buds on the far side of the cane(left next to post) that come up out of the ground opposite the mother vine.
The layer is covered with soil and the soil is tamped down.
The layer is covered with soil and the soil is tamped down.
The layer is all set to root and produce a new vine next year. It will remain attached to the mother plant during the next growing season and will be detached from the mother vine in the next dormant season.
The layer is all set to root and produce a new vine next year. It will remain attached to the mother plant during the next growing season and will be detached from the mother vine in the next dormant season.
Posted in Grapes, Students | Leave a comment

End of the growing season

I expect the grape leaves will fall since the low temperature predicted for today may be in the 20s.

GDD base 50 accumulated since April 1 = 3556
http://agebb.missouri.edu/weather/reports/gddTable.asp

Here is a comparison of the GDD base 50 accumulation for the past several years.

Year GGD accumulation base 50 April 1 to Oct 31
2014 3556
2013 3435
2012 4064*
2011 3853

*Early grape bud burst in March – 4370 GDD in season if March is counted

(Grape bud burst usually occurs around April 1)

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John Avery’s retirement party

Today we got together to wish John Avery a wonderful retirement. Along with our faculty and staff, Dr. Jim Moore, former director of the State Fruit Experiment Station, Jack Atcheson, former field and maintenance worker, the Simpsons and Frenches of Simpson’s Family Farm, and the McMurtrey’s of McMurtrey Vineyards attended. Dr. Elliott and all of us wish John a happy retirement.

John Avery shows us his ice cream cake with an apple design.
John Avery shows us his ice cream cake with an apple design.
John says a few words and appreciates his engraved knife from all of us.
John says a few words and appreciates his engraved knife from all of us.
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Grape phenology and GDD accumulation

GDD base 50 accumulated since April 1 = 3533
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 = 3469
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 = 3448
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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