#209 - July 20, 2012
Submitted by tkmartin on Wed, 07/25/2012 - 13:18
By U.S. Department of Labor (DOL), Occupational Safety and Health Administration (OSHA)
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Harvest is coming on very quick and our wineries and vineyards are making last minute deals to buy/sell their grapes. One key factor that often remains unclear in these negotiations is the amount of grapes that are being negotiated for. It is VERY, VERY common for a winery to find out that they have bought much less or much more than expected. One way to keep these surprises to a minimum is to do a yield estimate prior to delivery. One can use estimated cultivar cluster weights taken from a table, but it is much better to take an actual representative sample of clusters and weight them to get an average. Recommendations vary, but counting all the clusters on 10 to 15 vines and weighing 100 clusters total from these same vines should get you within (+ or -) 15% of the actual yield of a cultivar in a representative area.The larger the sample, the better the answer.
Some will even go so far as to get an average berry weight by counting the berries per cluster when weighing the clusters. Berry weights each season will vary much less than cluster weights and can be used to make a more
accurate yield estimate in future years. Randall Vos at the Des Moines Area Community College (DMACC) has put together a good online yield estimation tool that can be used based on clusters and/or berries here: http://www.dmacc.edu/programs/viticulture/cropcalc/cropcalculator.aspx
An electronic fishing scale works very well for measuring cluster weights in the field. Many will weight up to 50 lbs. total in 1 oz. increments and are very accurate. The better ones typically run in the $25 to $50 range.
What about the weight of the rachis (the stem the grapes are attached to)? The rachis will run approximately 5% of the total cluster weight (varies slightly by variety).(3) The rachis weight should be of no matter if you are selling whole clusters to the winery. Mechanical harvesters tend to leave the rachis hanging on the vine so the rachis weight could be deducted from the estimated yield.
I have posted a simple yield estimate form you can use to guestimate your yields here: mlw http://www.extension.iastate.edu/wine/sites/www.extension.iastate.edu/files/wine/71210EstimatingGrapeYield.pdf
Additional grape yield estimation resources:
1. Methods of Crop Estimation in Grapes, Ohio State Univ. Extension:
2. Crop Estimation, Des Moines Area Community College: https://go.dmacc.edu/programs/viticulture/blog/Lists/Posts/Post.aspx?List=815d7362-ea51-4f6e-8f6e-d971bcc45b9d&ID=36
3. Yield Forecasting, University of Melbourne, AU:
4. Crop Prediction, Chapter 12, North Carolina Grape Growers Guide:
5. Yield Estimation, Washington State University Extension:
6. Crop Yield Estimate, Penn State University:
The Mid-American Wine competition was held last week on the Des Moines Area Community College campus in Ankeny, Iowa. Only bonded wineries in the Midwest region were allowed to send in entries. You can now view the results from this competiton here: http://www.midamericanwine.org/2012medals/Pages/state2012.aspx
This constant heat and drought stress is bringing on our grape harvest MUCH, MUCH sooner than we expected. It looks like the southern half of Iowa will be starting the grape harvest during the first week of August. Maybe sooner in some situations. This will be 2-3 weeks earlier than normal.
June 1st has been the typical date many vineyards in Iowa stop using Mancozeb/Manzate/Penncozeb because of the 66 day Preharvest Interval (PHI) on the label. This may create some unwanted harvest delays this season.
Dr. Ajay Nair, Extension Vegetable Specialist
A field day highlighting Iowa State University fruit and vegetable research is planned for July 23 at the ISU Horticulture Research Station near Gilbert. Organizers say the field day will be of interest to commercial producers, small-scale growers, master gardeners and home gardeners.
The field day will feature research-based information on a variety of topics including biochar, apple root stocks and training systems, organic production, and high-tunnel fruit and vegetable production. It is scheduled to run from 8:30 a.m. to 3 p.m., giving vegetable and fruit producers ample information to enhance their skills and diversify gardens and acreages.
During the afternoon session a panel of growers, researchers, agriculture professionals and extension personnel will discuss current and future needs of the fruit and vegetable industry in Iowa. Also showcased will be a student-run vegetable enterprise geared towards developing entrepreneurial and business skills. The Department of Horticulture and Leopold Center for Sustainable Agriculture will partner with the Iowa Fruit and Vegetable Growers Association to sponsor the event. "We firmly believe that strong grower-researcher collaboration is needed to address ongoing issues and challenges, and develop new ideas for fruit and vegetable research in Iowa," said Ajay Nair, extension vegetable specialist.
The $25 field day registration fee includes lunch, refreshment breaks and abstracts of ongoing research projects. For more details or to register online visit www.aep.iastate.edu/hort . Early registration for the field day is $25 through midnight, July 16. Late registration or at the gate will be $35. To assist with meal and facility planning advance registration is greatly appreciated.
A field day will be held at the George Spencer Vineyard near Gibbon, Neb., on Saturday, July 28 at 9 a.m. This field day is hosted by Nebraska Winery and Grape Growers Association (NWGGA) in cooperation with the University of Nebraska Viticulture Program (UNVP) and the Kegleys.
UNL Weed Specialist Lowell Sandell will discuss important aspects of spray technology, and types of sprayers and nozzles will be demonstrated in the morning. In the afternoon, trellis construction, changing trellis systems, layering, vine balance and canopy management will be discussed by UNVP specialists in a "hands-on" fashion so that all participants will be able to gain knowledge about these and related topics.
This field day (lunch included) is free to all NWGGA members thanks to a grant obtained by the NWGGA from the Nebraska Grape and Winery Board. Non-members may attend for a fee of $10. Be sure to plan to attend and bring your questions for the experts. The Vineyard is one half mile south of Hwy 30 at 7155 Pawnee Road (east rail crossing in Gibbon). Register with Growers Representative Kay Miller by email at email@example.com or phone (308) 763-1963 or with UNVP Research Technologist Steve Gamet, firstname.lastname@example.org or (402) 416-9763 by July 25 5
This will be the 4th year that the Iowa State Fair has teamed up with the Iowa Grape & Wine Industry to display our industry to the 1million+ visitors that come the Iowa State Fair each year. The Iowa State Fair will run from Thursday, August 9th through Sunday, August 19th this year.
The "Wine Experience" includes, grape stomping, kids grape activities, display vineyard, equipment display, wine tasting, music and informational speakers and will again be housed in and around Grandfather’s Barn. "New" this year will be the Iowa Wine Growers Association Wine & Cheese Garden that will be located under the shade trees to the west of the barn. There will be wine, cheese and live music each evening. Under the shade trees on top of the hill next to Grandfather’s Barn.
All volunteers will receive a free entry and parking pass. No experience is necessary.
74 of 165 shifts left to fill
There will be three working shifts each day:
9 a.m. to 1:30 a.m.
1:30 p.m. to 5:30 p.m.
5:30 p.m. to 9 p.m.
INTERESTED in having a GOOD TIME and getting in FREE to the Iowa State Fair. Contact: Mike White at email@example.com or 515-681-7286.
When: 10 a.m. to 5 p.m. Tuesday, August 28, 2012
Where: Willett’s Winery and Cellar, 105 East Market Street Manito, IL 61546
What: Led by Illinois state enologist Bradley Beam, this workshop will focus on all aspects of the winemaking process, with a special emphasis on harvest-time handling and sound winemaking procedures. Topics include: Analysis basics, Measurements and Conversions, Cleaning and Sanitation, Crushpad Equipment and Decisions, Fermentation Management, Fining and Filtration, and Bottling. There should be plenty to see and do, as harvest is likely to be underway at this time.
Who should attend: Open to both amateur and commercial producers. Attendees are also encouraged to bring a wine or two to share and discuss. Price includes lunch and coffee/snacks.
Registration: $15 for IGGVA members, $65 for non-members. You may join the IGGVA and still receive discount for this workshop. RSVP with payment (checks made out to IGGVA) by August 21st to:
Megan Pressnall, Director of External Relations
Illinois Grape Growers and Vintners Association
2900 Greenbriar Rd. Springfield, IL 62704
P: 217.726.8518 or firstname.lastname@example.org
To download a membership application:
Current U.S. Drought Monitor
Chaptalization:The process of adding sugar to unfermented grape must in order to increase the alcohol content after fermentation.
"Drink wine, and you will sleep well. Sleep and you will not sin. Avoid sin, and you will be saved.
Ergo, drink wine and be saved."
--- Medieval German saying
"One of the disadvantages of wine is that it makes a man mistake words for thoughts."
--- Samuel Johnson 7
1. 8 Excellent and Free Online Tools for Businesses and Individuals, 7-11-12 – NorCal Wine
2. Strategies for Effective Facebook Wall Posts: A Statistical Approach, 15 p. pdf , Buddy Media,
1. 30’ Long weighing 3 tons - Chinese Bottle of Wine:
2. Wine Ice Cream: http://www.bottlenotes.com/the-daily-sip/wine-tips/wine-ice-cream
1. MO: Hot, Dry Conditions Bring Mixed Forecast For Missouri Wine Producers, 7-5-12 – Southeast Missouri State University:
2. SD: From vine to wine, 7-12-12 – Brookings Register (SD State Grape Research):
3. Undersea cellaring service preparing to launch, 7-17-12 – Decanter.com:
4. MN: Grape Expectations for Minnesota Wineries, 7-18-12 – Star Tribune:
5. AL: Uncorked: Local winery bottles an historic grape – History of Norton Grape, 7-18-12 – Anniston Star:
6. Taking the Mystery Out of Wine Yeast Selection, 7-18-12 – Midwest Wine Press:
7. Terroir: What does it mean? 7-19-12 – Napa Valley Register:
8. Practical Advice on Reducing Wine Alcohol Levels, 6-19-12 – notes from the Winemaker
9. Musical wine glass:
1. Drought drying up profits for vineyards, 7-6-12 – KETV.com, Omaha:
(Kings Crossing Vineyard & Winery at Glenwood, IA)
(Right) Christine Carlton, co-owner of Two Saints Winery at St. Charles, IA shared this photo of some Frontenac grapes hanging in their vineyard. 7-17-12!!
On Tuesday, 7-17-12 a group of university agronomy students from Costa Rica hosted by Iowa State University toured White Oak Vineyards in Cambridge, Iowa.
Iowa State University has been hosting these Costa Rican tours since 1994. Every other year, Iowa State students then visit Costa Rica.
Sixteen students and four of their professors where on this year’s tour. We want to thank Janet and Chris Harmeyer and their son Mathew of White Oak Vineyards for hosting this tour. Here are a few pictures of their visit:
(Left) Mathew Harmeyer, son of Janet & Chris Harmeyer and winemaker shows the Cost Rican students the wine cellar.
(Right) Chris and Mathew Harmeyer welcomed the Costa Rican students in the large tasting room of White Oak Vineyards.
(Left) St. Croix grapes beginning to go into veraison growth at White Oak Vineyards. 7-17-12
(Right) Oh the thrill of owning a winery. Chris Harmeyer filling out paperwork, paperwork and more paperwork! 7-17-12
7-23, ISU Fruit and Vegetable Field Day – ISU Horticulture Research Station north of Ames, IA. Full details: : http://www.aep.iastate.edu/hort.
7-25, MSU 23rd Annual Viticulture Field Day & Steak Cookout – Southwest Michigan Research & Extension Center – Michigan State University: Details: http://agbioresearch.msu.edu/swmrec/news.html
7-(25-26), 2nd North East Vineyard Equipment Show and Demonstration Anthony Road Vineyards, 1020 Anthony Road, Penn Yan, New York 14527 Details: http://blogs.cornell.edu/nnygrapeupdate/2012/06/27/2nd-north-east-vineyard-equipment-show-and-demonstration/
7-(25-27), Society of Wine Educators 30th Annual Conference – San Mateo, CA. Details here: http://www.societyofwineeducators.org/conference.php
7-29, 11 a.m. to 3 p.m. Minnesota Grape Growers Association Annual Picnic – Round Lake Vineyard, 30124 State Hwy 264 Round Lake, MN 56167 Details: http://mngrapegrowers.com/mgga-annual-picnic1
8-16, International Cold Climate Wine Competition, University of MN Continuing Education Conference Center: http://www.mngrapegrowers.com/competition
8-28, Winemaking Fundamentals Workshop –Willett’s Winery and Cellar, Manito, IL 61546. Sponsored by IGGVA , $15 ea. Contact Megan Pressnall: P: 217.726.8518 or email@example.com
9-8, 10 a.m. to 1 p.m.UMN Annual Horticulture Research Center Vineyard & Winery open house, 600 Arboretum Dr., Excelsior, MN. Details later.
10-(19 & 20), Small Scale Commercial Wine Making School IX - Nebraska City, NE by Five Rivers RC&D. Details: http://www.nercd.org/council-of-twelve/five-rivers/what-were-doing-five-rivers/
11-(1-3) 20th Annual Small Farm Trade Show & Conference – Boone County Fairgrounds, Columbia, MO. Sponsored by Small Farm Today Magazine: http://www.smallfarmtoday.com/trade-show.html
11-28 to 12-1, VitiNord & International Cold Climate Grape and Wine Conference - Neubrandenburg, Germany. Details soon: http://www.vitinord-nb2012.org
1-(29-31)-13, Unified Grape & Wine Consortium at the Sacramento Convention Center, Sacramento, CA http://www.unifiedsymposium.org/
1-31 to 2-2-13, Illinois Vintners & Grape Growers Assn. Conference – Crown Plaza Hotel, Springfield, IL.
2-(7-9)-13, Midwest Grape & Wine Conference & Trade Show – St. Charles, MO Convention Center: Details: http://www.midwestgrapeandwineconference.com/
2-(21-23)-13, Minnesota Grape Growers Association (MGGA) Cold Climate Conference – Crown Plaza, St. Paul. MN. Details: http://mngrapegrowers.com/conference
2-28 to 3-2 – 2013, 16th Nebraska Winery & Grape Growers Conference, Holiday Inn – Kearney, NE
3-(6-7)-13, Eastern Winery Exposition at Lancaster County Convention Center & Lancaster Marriott at Penn Square, PA: http://easternwineryexposition.com/
3-(12-14)-13, Wineries Unlimited at Greater Richmond Convention Center, Richmond, VA: http://www.wineriesunlimited.com/
3-(15 & 16)-13, Iowa Wine Growers Assn. Annual Conference at the West Des Moines Mariott. Details later: http://www.iowawinegrowers.org
Past issues archived as html and/or pdf here:http://www.extension.iastate.edu/wine/news
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Michael L. White - CCA, CPAg, CSW
ISU Extension Viticulture Specialist
909 East 2nd Ave. Suite E, Indianola, IA 50125-2892
ph: 515-961-6237, fax: 6017, cell: 515-681-7286
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