Improve Canopy Management and Reduce Disease with Dr. Richard Smart
The University of Minnesota and SMWGA will be hosting world renown viticulturist Dr. Richard Smart for a seminar, "Improved Canopy Management and Trunk Disease Implications for the Midwest" on June 25th, from 3-5pm at the UMN Horticultural Research Center. The seminar will be followed by a meet and greet reception from 5-6pm with Dr. Smart, featuring Minnesota wine and appetizers.
To register: The event is $35, or $30 with a SMWGA membership. Please pre-register for this workshop in order to help us account for refreshments and seating. To RSVP, call or email Lisa Smiley at 651-492-5393 or email@example.com.
The event will take place at the Horticultural Research Center, 600 Arboretum Blvd, Excelsior, MN.
About Dr. Richard Smart:
With over 40 years of experience consulting with viticulturists and winemakers around the globe, Dr. Smart is a global leader on vineyard management techniques. He is also the author of the book Sunlight Into Wine, viticulture editor of The Oxford Companion to Wine, and co-developer of the Smart-Dyson Trellis system. He has worked extensively to study and communicate how canopy management practices impact wine quality and yield, as well as how changing climates may impact the global wine industry into the future.
Have you been thinking about starting a vineyard or a small grape planting? The best way to learn what it takes to start a vineyard is to help out at another established vineyard. However, these opportunities do not come along every day.
Fortunately, The Winery at Sovereign Estate is planting a new vineyard on June 16 and is offering free lunch and a viticulture class in return for helping to plant grapevines for a couple of hours! It will be a great learning opportunity for the beginner vintner, hobby grower, or someone looking to brush up on their skills before expanding their current vineyard. Details:
Vineyard Planting Outing – You’re Invited!
The Winery at Sovereign Estate and the University of Minnesota Extension viticulture program would like to invite you to a free vineyard planting outing.
Saturday, June 16th from 8:00am-2:00pm
The Winery at Sovereign Estate
9950 North Shore Road, Waconia, MN 55387
Start with a “classroom” lesson from the U of M’s Extension horticulturist, Annie Klodd, who will describe site selection, soil preparation, planting orientation, and planting…of course.
Then, put that new knowledge into action and head to the field where you will get to experience planting a vineyard of Marquette vines
Please RSVP by clicking the link below
Or email firstname.lastname@example.org
Lunch and refreshments will be provided. Bring gloves and dress for the outdoors.
Hope to see you there!
How Minnesota farmers are using different plant varieties, and new techniques, to extend the state's growing season on MinnPost.com
RESEARCHERS BRING WINE GRAPES TO COLD CLIMES on suruchimohan.com
Dr. Richard Smart:
Improved Canopy Management and Trunk Disease Implications for the Midwest
You are invited to a seminar and meet & greet with Richard Smart, global leader on vineyard canopy management techniques and author of Sunlight into Wine.
Dr. Smart will be speaking at the Minnesota Landscape Arboretum on Monday, June 25 from 3-5pm. A wine reception and refreshments with Dr. Smart will follow from 5-6pm. Registrations required. Clicke below to see the full flyer.
Grapevine Pruning and Vineyard Prep Workshop
Get ready for the 2018 season with the Southern Minnesota Wine Grower Alliance and University of Minnesota Extension!
Visit the vineyard of Keith and Lisa Smiley to learn best practices for pruning vines on VSP and high cordon, managing winter injury, and choosing between training systems. Then get hands-on experience taking soil samples and evaluating vineyard health.
When: Saturday April 21, 10:00am-noon
Location: 10500 310th Street Way, Cannon Falls, MN 55009
Annie Klodd, U of MN Extension Educator-Fruit and Vegetable Production
Lisa Smiley, Executive Director, Southern MN Wine Grower Alliance
Coffee and donuts included!
To register, contact Lisa Smiley at email@example.com or 651-492-5393. You can also register at the event starting at 9:30am. Registration is $10/person. Make checks payable to SMWGA. Checks can be mailed to 10500 310th Street Way, Cannon Falls, MN 55009.
Getting to the vineyard: 10500 310th Street Way Cannon Falls, MN 55009 (Google maps link)
Annie Klodd, Matt Clark, and John Thull
We have heard multiple reports of severe cluster necrosis, particularly on Marquette grapes in 2016 and 2017 in Minnesota, including here at the U of MN Horticultural Research Center. In some vineyards, it has caused substantial or complete crop loss.
Growers report that the clusters rapidly shrivel and die during veraison, while the plants and clusters appear healthy up until this point. It does not appear to be caused by black rot, mildew or botrytis. The rachis on the clusters desiccate first, followed by the berries.
This problem is still undiagnosed, however we recognize potential causes that are consistent with these symptoms. We are currently investigating it to determine the causes and extent, in order to develop appropriate management recommendations.
Knowing the number and geographic range of vineyards affected will help us address the issue most effectively. If you have experienced cluster necrosis in Marquette or another cultivar, we welcome you to contact us at firstname.lastname@example.org.
One potential cause - Bunch Stem Necrosis
While the issue is currently undiagnosed, one potential cause could be a physiological grapevine disorder called Bunch Stem Necrosis (BSN). It is not a pathogen or pest problem, but rather a disorder within the plant that is caused by environmental factors. It has been documented in many different cultivars including but not limited to Cabernet Sauvignon, Riesling, Himrod, Marquette, and some experimental hybrids.
Symptoms of bunch stem necrosis
The symptoms of BSN can occur during bloom, or during and after veraison. During bloom, pedicels darken and die, causing the flowers to fall to the ground. At veraison, BSN first appears as small, dark lesions on the rachis and pedicels (stem sections of the cluster). As the lesions expand they desiccate the pedicels and rachis, causing the berries to shrivel and die.
Causes of Bunch Stem Necrosis
There are several potential causes of BSN, and they vary between individual vineyards. There is no known pathogen or insect pest associated with BSN. Rather, it is a plant physiological disorder that appears to occur following certain environmental stresses. Below are some of the possible causes of BSN based on previous research around the world. These differed between studies, vineyards, and years:
- Magnesium (Mg) or calcium (Ca) deficiency2
- Nitrogen deficiency or toxicity1,5
- Heavy and irregular rainfall during veraison3
- Below-average temperatures before bloom3
- Standing water, and “wet feet” combined with heavy soil have also been proposed
More research is needed to determine the best management practices for bunch stem necrosis in Minnesota. Management will likely depend on the root cause of the issue at the site. Some studies have found that applying Mg and Ca as a soil fertilizer or foliar spray may alleviate BSN symptoms.2,4 but these results were inconsistent across instances, with other studies finding no effect. In some cases, altering pruning intensity has been found to reduce BSN.3
To address the recent necrosis issue in Minnesota and develop regional management recommendations, we hope to confirm whether the issue is BSN or another problem; narrow down the causes; and evaluate the effectiveness of various management options.
- Capps ER and TK Wolf. Reduction of bunch stem necrosis of Cabernet Sauvignon by increased tissue nitrogen concentration. Am. J. Enol. Vitic 2000. 51(4): 319-328.
- Cline RA. 1987. Calcium and magnesium effects on rachis necrosis of interspecific hybrids of Euvitis grapes cv. Canada Muscat and cv. Himrod grapes. Journal of Plant Nutrition 10: 9-16.
- Holzapfel BP and BG Coombe. 1995. Incidence of grapevine bunchstem necrosis in South Australia: effects of region, year and pruning. Aus. J. Grape and Wine Res. 1(1): 51-54.
- Jackson DI. 1991. Environmental and hormonal effects on development of early bunch stem necrosis. Am J Enol Vitic. 42: 290-294.
- Keller M and W Koblet. 1995. Stress-induced development of inflorescence necrosis and bunch-stem necrosis in Vitis vinifera L. in response to environmental and nutritional effects. Vitis 34(3): 145-150.
Please plan to attend the 2018 Grape Breeding and Enology Research Update on Saturday, March 17 in conjunction with the Cold Climate Conference.
For this year only, graduate students and researchers will present their findings and updates on ongoing projects at the conference hotel. There is no charge to attend the research update, but please register and make a selection if you would like to stay for lunch ($25). Attendees will also have free access to the CCC Exhibit Hall on Saturday.
Saturday, March 17th. Registration begins at 8:45 AM
Session: 9:00 AM - 11:00 AM
Lunch: 11:00 - 12:15 PM Exhibit Hall
WHERE: DoubleTree by Hilton, Bloomington, MN
Lunch - $25 If you are not attending the Cold Climate Conference, but would like to join us for lunch in the Exhibit Hall.
No Charge If you attend only the U of M Viticulture Update from 9:00 - 11:00
Free parking available at the DoubleTree.
Annie Klodd joined the University of Minnesota Extension in January as the new Assistant Extension Professor for Fruit and Vegetable Production. Her extension program will center on supporting Minnesota growers and improving fruit and vegetable production practices at both the commercial and home scales. She is excited to work with Minnesota grape growers and views viticulture as an important part of her program.
Annie is originally from Indianola, Iowa where her family owns a commercial vineyard and winery. She started working in the vineyard in 1997 when her family planted their first grapes, and also loves introducing customers to Midwest wines. She continued to work in viticulture as a graduate student at Penn State University, studying how perennial cover crops can be used to manage excess vine vigor. Most recently, she worked for Penn State Extension and led a national outreach program on integrated weed management. She is delighted to be returning to the Midwest horticulture industry!
Annie is conducting a needs assessment and wants your input. Along with collaborators Matt Clark and Brigid Tuck, Annie would like to capture a snapshot of the history of the grape growing and wine industry in Minnesota to help develop effective programming and to promote the industry going into the future. Come meet Annie at the MGGA Cold Climate Conference!
What topics or issues would you like to learn about? Would you rather gather information through webinars, vineyard tours, study circles, newsletters, seminars, or something else? Do you have burning questions from the vineyard that would make for an interesting research topic? Here’s the link again, please tell us what you think.
Registration is now open for the 9th Annual International Cold Climate Wine competition. Click on the logo to learn more.
Winter is Minnesota can be one of the most challenging times for the grape plants. It's the main reason V. vinifera varieties aren't grown here. Learn a little bit about whats going on in the vineyard in winter.
Wine making is a rewarding career, but is not free from headaches. A wine maker's nightmare is the re-fermentation of sweet wines and the instability of some wines. This blog entry addresses the topic and offers some strategies to avoid and mitigate a potential devastating re-ferment.
Are you curious if your wine is finished with malolactic fermenation? Here is a quick reminder on how to test with paper chromatography.
ALERT: September 27, 2016. Spotted Wing Drosophila (SWD) in Grapes: A short memorandom on SWD in Minnesota and associated volatile acidity. Read more here.
Fall vineyard managment should focus on managing insects, vertebrate pests, rots, and diseases that will impact the vines in the next growing season. Making quality wines requires disease intervention and sorting, as infected fruit will impact wine quality. Read more here.
“From Vine to Glass: Understanding the Flavors and Aromas of Cold-Hardy Grapes and Wine”
Tuesday, May 17th*, 2016
12:00 Noon Eastern (11:00 am Central)
7:00 pm Eastern (6:00 pm Central)
*Please note this is a date change from the original date of May 10th.
Join Anne Fennell of South Dakota State University, Adrian Hegeman of the University of Minnesota and Somchai Rice of Iowa State University as they discuss their research conducted on Marquette and Frontenac as part of the Northern Grapes Project.
Friday April 29, 2016
This Saturday April 16, 2016
The University of Minnesota releases its news wine varieity 'Itasca' on April 4, 2016
Experimenting with different grafting techniques including grafting Ampelopsis with a hybrid rootstock.
Early bud chop counts on cold-hardy cultivars at the HRC