#247 - July 5, 2013


Lag Phase Yield Estimate

The lag phase of berry development corresponds to the slow period of berry development approximately 50-55 days after first bloom or 1,000-1,300 Growing Degree Days (GDD) units (base 50°F) for many of our cultivars. We are now in this range of GDD’s in Iowa. You can find the GDD’s for your area in Iowa here: http://mesonet.agron.iastate.edu/current/gs.phtml
The berries have attained about 50% of their final weight at the lag phase. A multiplier of 2 can be used to predict the cluster weight at harvest. Keeping long term records of average cluster weights at the lag phase and at harvest will give you a more accurate multiplier to use in the future. A sample of 100 –200 clusters is recommended during this time of the season.
The Midwest Grape & Wine Industry Institute has a yield estimation form you can use here: http://www.extension.iastate.edu/wine/sites/www.extension.iastate.edu/files/wine/71210EstimatingGrapeYield.pdf

Iowa’s "New" Vineyard & Winery Map

Each year ISU Extension produces a new Iowa commercial vineyard and operating winery map to display at the "Wine Experience" exhibit at the Iowa State Fair. Prior to this we were producing a map each year for the Farm Progress Show and the Farm & Field Fest event. Iowa has over 100 state licensed wineries, but not all of them are operating. The 95 wineries shown on the map are the ones I consider open for business. The commercial vineyard list comes from my database of vineyard owners who have told me that they intend to or are selling commercially. We have no "Official" government produced commercial vineyard list for our state. Identifying all the commercial vineyards is not that easy. Not every commercial vineyard in Iowa wants to be on a list.
Our industry is maturing. The number of Iowa wineries has stayed in the 90-100 range for the last several years. The number of vineyards has dropped from a high of 413 to 306 today. As the number of vineyards decline, the ones that remain seem to be expanding their vineyard acreage. My guestimate is that the average vineyard is now around 4 acres in size today with Iowa having approximately 1,200+ acres in commercial grape production.
We started producing this map in 2004. Here are the numbers since 2004:
Year 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
# Vineyards 165 260 326 382 389 398 413 301 306 306
# Wineries 30 42 68 67 69 74 85 92 99 95
Iowa Grape Expectations Map 2013
FREE Midwest Wide CLASSIFIEDS for vineyards and wineries at Midwest Wine Press here:

Volunteer for the Iowa State Fair "Wine Experience"

Kids grape stompThis will be the 5th 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 to the Iowa State Fair each year. The Iowa State Fair will run from Thursday, August 8th through Sunday, August 18th 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. The Iowa Wine Growers Association Wine & Cheese Garden is now 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. 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.                       150 shifts left to fill
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 mlwhite@iastate.edu or 515-681-7286.

2013 Japanese Beetles Have Emerged

Japanese Beetles on grape leafISU Extension started to hear reports of Japanese Beetles on June 5th last year. Our cool spring and early summer has delayed their emergence this year. Don McCabe of Lindon Wines in Burlington, Iowa was the first to let me know that they had started to emerge on 7-3-13 this year. This would be right on time based on the 1,030 Growing Degree Day (GGD) units based on 50°F that are needed for the adult beetles to start emerging. You can see the latest GDD base 50°F Iowa map here in "Japanese Beetles Begin Emergence" 6-20-13 – ISU Extension here:
This is the latest map we have of the Iowa Counties where Japanese Beetles have been found in the past.
Japanese Beelte map of Iowa
For Japanese Beetle management options in the vineyard, check out: "Get Ready for Japanese Beetles" in Wine Grower News #173, 7-1-11:

2013 Intl. Cold Climate Wine Competition

International Cold Climate Wine CompetitionOpen to: Commercial wineries only, 31 different categories
Cost: $40 per entry
Online Registration: Starts Friday, May 17, and closes at 11:00 p.m. CST on Thursday, August 1. Pre-registered entries must arrive by 4:30 p.m. on Monday, August 5.
Competition to be held August 16, 2013
Sponsored by: University of Minnesota & the Minnesota Grape Growers Association (MGGA)
Precision viticulture: The cultivation of grapes using an approach that applies appropriate vineyard management practices according to variation in environmental factors (soil, topography, microclimate, etc.). Typically the approach uses technological tools (GPS, GIS, remote sensing, etc.) to measure local variation, and manages different vineyard areas accordingly to maximize yield and quality, while minimizing risk and environmental impact.

7-8 Deadline – Iowa State Fair Commercial & Amateur Wine Competition

Iowa State FairJuly 1st is the early entry deadline for the Iowa State Fair amateur and commercial wine competition. Late entries can be made from July 2nd to 8th for twice the regular entry fee. Amateur fees are $5 / $10 and the
commercial fees are $25 / $50. Amateur entries need to be delivered to the Iowa State Fairgrounds on Saturday, July 22nd. The commercial entries need to the Iowa State Fairgrounds from July 15th -19th. Both competitions are open to only Iowa winemakers.
Pyrazines: A group of aromatic compounds in grapes that contribute to some of the green herbaceous notes in wine from the green bell pepper notes in some Cabernet Sauvignon to the grassy notes of some Sauvignon blanc. In red wines, the abundance of pyrazines can be a sign that the grapes came from vines with vigorous leaf canopy that impeded the ripening process of the grapes.

7-13, Iowa Northern Grapes Project Viticulture Field Day

Northern Grapes ProjectWhen: 9 a.m. – 3 p.m. Saturday, July 13, 2013
Time: Location and studies being conducted
8:30 am      Registration at Penoach Vineyard & Winery, 26759 N Ave (US Hwy 169), Adel, IA
9:00 am      Penoach Vineyard tour (Stan and Joanie Olson owners)
Frontenac and Marquette canopy management
Marquette crop load management
(Dylan Rolfes, graduate student)
10:00 am      Hickory Creek Vineyard, 23517 260th Street, Adel (one mile north and ¼ mile east of Penoach, Bill James owner)
La Crescent training systems & Crop Load Management
11:00 am      Travel to Snus Hill Winery, 2183 320th St., Madrid, IA (John & Diane Larson, owners)
12:00 noon   Snus Hill Winery:La Crescent canopy management (Dylan Rolfes)
12:30 pm      Lunch at the winery catered by Hickory Park
1:15 pm    Frontenac training systems & crop load management
2:00 pm      Taste wines made from Minnesota selections in the NE-1020 cultivar trial
(Paul Tabor, Tabor Home Vineyards & Winery)
3:00 pm      Adjourn
Comments: A rapid rise in juice pH during maturation coupled with the retaining of high levels of acids, high juice potassium, a different profile of tartaric to malic acid, and “herbaceous” characters have been issues in making wines from cold hardy northern grape cultivars with Vitis riparia parentage. These same characteristics have also been attributed to grapes from overly shaded canopies. The Northern Grapes viticulture team has undertaken studies to determine if cultural practices can improve fruit quality and winemaking potential of Marquette, Frontenac, and La Crescent grapes. Studies being conducted in Iowa include the evaluation of different training systems, canopy management practices to improve light distribution, and crop load management. The field day will tour these trials and you will have the opportunity to taste wine made by Paul Tabor from some Minnesota selections in the NE-1020 cold hardy grape cultivar trial. One of the selections is MN-1220 that the University of Minnesota is considering to name and release.
Registration: Contact Mike White mlwhite@iastate.edu or Ph: 515-681-7286 to register before July 8th.
Cost: $15 each if registered before July 8th, $20 for late registration. Pay at the door.
USDANote: The Updated Northern Grapes Project Iowa Research Report summaries can be found here: http://viticulture.hort.iastate.edu/research/research.html#northerngrapes

Wine Sanitation Workshops – Michigan

Workshop 1
When: July 22, 2013 8:30 a.m. to noon
Where: L. Mawby Winery production facility, 121 4th St. Suttons Bay, MI
Who: Nicholla Hall of Scott Labs & Paul Jenkins of MSU
Cost: $49 for 1st person of winery, $19 for additional winery personnel
Workshop 2
When: July 24, 2013, 8:30 a.m. to noon.
Where: Fenn Valley Vineyard & Winery, 6130 122nd Ave., Fennville, MI
Who: Nicholla Hall of Scott Labs & Paul Jenkins of MSU
Cost: $49 for 1st person of winery, $19 for additional winery personnel

7-24, Wine Making Bootcamp – Aviston, IL

Where: Hidden Lake Winery – 10580 Wellen Road , Aviston, IL 62216 ph: 618-228-9111
Who:   Bradley Beam – Enology Specialist for the Illinois Grape Growers& Vintners Assn.
Chris Gerling, Enology Extension Specialist – Cornell University
John McClain of McClain Ozone
Topics to include:
Winery Tour with discussion of layout and processing equipment
Review of Cleaning and Sanitation
Ozone Demonstration and Discussion
Planning for harvest from a winemaker’s perspective
Harvest analysis and SO2 demo
Cellar movements – racking, pumping, effective inert gas application
Lunch will be provided.
Cost: IGGVA members $10/person, non-members $50 (includes non-voting IGGVA membership enrollment)
Please RSVP: no later than July 19 to bradleybeam@gmail.com . Cash and checks may be brought the day of the event. Make all checks out to IGGVA.

Notable Quotables

The first Minnesota winery opened up in 1977. Today there are 43 wineries statewide and it just keeps growing, according to data from the Minnesota Grape Growers Association.
From: MN: Wine Country Growing in Minnesota, 6-20-13 – KARE11 TV
"The results of this study were promising in that it appears as though the implementation of an Integrated Pest Management system in Sardinia, Italy has resulted in a marked reduction of pesticide residues in grapes and finished wines."
"As a result of a recent U.S. Tax Court ruling, those who sign a Conservation Reserve Program contract, whether they are involved in a farm business or just own the land, will find their CRP payments subject to self-employment tax"

7-28, Minnesota Grape Growers Assn. Annual Picnic – Spring Valley, MN

Minnesota Grape Growers AssociationWhere: Four Daughters Vineyard & Winery 78757 Minnesota 16 Spring Valley, MN  55975
When: 11 a.m. to 3 p.m. Sunday, July 28, 2013
What: Potluck Picnic
Educational Tours – Trellis & Training Options
- Homemade Vineyard Equipment

Marketing Tidbits

1. Wine-Infused Popcorn is the Holy Grail of Movie Theatre Snacks, 6-27 – Food Beast:
2. "Cellar Mates is a collaborative winery and tasting room that will allow four, like-minded boutique wineries to share a facility where they can make their own wine, store and manage their barrels, as well as have a tasting room where they can sell their wines,"
3. "in contrast, personal income grew 1.6 percent in South Dakota, the only state with an increase in the first quarter."
From: Americans incomes drop, 6-28-13 – Sloan
4. How Storytelling Can Add Value to Wines, 7-1-13 – Teatro Naturale: http://www.teatronaturale.com/article/4342.html
5. MO: Eco-Friendly Pouches from St. James Winery, 7-4-13 – FoodBev.com:

Show n Tell

On 6-28-13 I had the opportunity to stop by Karol & Terry Fox’s 10 acre vineyard located just north of Decatur City just north of the Iowa/Missouri border. This is the vineyard located on the east side of I-35 just north of the Hwy 2 intersection. Karol and Terry started growing just a few grapes in 2000 and now they are one of the major growers in the state. Everything they grow is on a single high wire trellis system. They currently have Catawba, DeChaunac, Frontenac, LaCrescent and Seyval to sell to wineries. They also have a few rows of table grapes that they have sold at Farmer’s Markets in the past.
Karol & Terry Fox
(Left) Karol & Terry Fox standing between rows of Catawba. Note the ridged up vine rows. This vineyard has 6" of topsoil laying over 30-40" of tight southern Iowa clay. Terry used a 2-bottom plow to throw a ridge of soil where the vines are planted. This dramatically improved the vigor of these vines. There is no irrigation in this vineyard. 6-28-13
double picking bin cart
(Right) Terry Fox build this homemade 3-point double picking bin cart to use when unloading his pull-type Braud mechanical grape harvester he will be using for the first time this season. 6-28-13
refrigerated trailer
(Left) Terry purchased this used electrically powered refrigerated trailer to cool down his grapes at harvest. 6-28-13

Videos of Interest

1. MI: Uncle John’s Hard Cider Market– St. John, MI, 7-4-13 – Growing Produce, 5:55 min.:

Articles of Interest

1. UK: Wine tasting: it’s junk science, 6-22-13 – the Guardian:
2. CA: Professor Decries Shortage of Farm Advisors, 6-28-13 – Wines & Vines:
3. SD: Members needed for Grape & Wine Board, 6-30-13 – Bismarck Tribune:
4. Tips on Proper Pesticide Container Disposal, 7-3-13 – Ag Professional:
5. UK: Wine tasting: it’s junk science, 6-22-13 – the UK Guardian:

Calendar of Events

7-(1-8), Deadline for Iowa State Fair Amateur / Commercial Wine competition. 7-1 deadline is $5 / $25 and 7-(2-8) deadline is $10/$50 per entry. Two bottles per entry. In-state only. http://www.iowastatefair.org/competition/categories/
7-13, ISU Extension Northern Grape Project Vineyard Field Day – Adel & Madrid, Iowa. Contact Mike White to register: 515-681-7286 or mlwhite@iastate.edu
7-22, Winery Sanitation Workshop – Suttons Bay, MI. Details here: http://store.chateauchantal.com/store/product/3521/MSU-Workshop-winery-sanitatio/
7-24, Winery Sanitation Workshop – Fennville, MI. Details here: http://store.chateauchantal.com/store/product/3522/MSU-Workshop-winery-sanitatio/
7-28, Minnesota Grape Growers Association Annual Picnic – Four Daughters Vineyard & Winery at Spring Valley, MN: http://mngrapegrowers.com/mgga-annual-summer-picnic
7-31 to 8-2, 37th Society of Wine Educators Annual Conference, Renaissance Hotel at Sea World in Orlando, FL: http://www.societyofwineeducators.org/conference
8-12, 2 -7:30 p.m. Fruit and Vegetable Field Day, Horticulture Research Station - Ames. Sponsored in part by PFI and IFVGA. Registration is now open here: http://www.extension.iastate.edu/article/2013-aug-12-fruit-and-vegetable-field-day
8-16, 5th Annual International Cold Climate Wine Competition. Details here: http://mngrapegrowers.com/competition
8-(8-18), Iowa State Fair Wine Experience Exhibit. Volunteer announcement will be sent out in July. http://www.iowastatefair.org/
8-26, Growing Great Fruits at Berry Patch Farm, Nevada, IA. Topics include strawberries, raspberries, apples, and blueberries. Details in PFI Field Day Guide.
9-(7-15), Clay County Fair will have a commercial vine/wine exhibit starting this year. Details later: http://claycountyfair.com/
9-10, U.S. Drinks Conference, Jacob Javits Center – NY, NY. Details: http://www.usdrinksconference.com/
1-(23 & 24), Iowa Fruit & Vegetable Growers Assn. annual conference – Ankeny, IA. Details later here: http://www.ifvga.org/
2-(20-23) Minnesota Grape Growers Conference Cold Climate Conference – St. Paul Minnesota. Details later here: http://mngrapegrowers.com/conference
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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(Above) Billboard near Spirit Lake, Iowa. Courtesy of Mark Newman (at 60 mph), owner of 99 Bottles Vineyard & Winery – Garner, IA 6-28-13
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