Update: Pruning winter-damaged vines

April 15, 2014
Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

First, the good news- it looks like the long-range cold temperature prediction for this Thursday that I mentioned last week won’t be as bad as my weatherman thought, so feel free to prune your vines this week. The bad news- if your vineyard is anything like the UVM vineyard, you’re likely looking at significant winter bud damage out there.

We calculated our primary bud damage in two ways after last Saturday’s assessment: first using the basal five buds per cane, and again using just the bottom two. Our table grapes are looking rough, even considering just the two basal buds that would normally be retained on spurs. Winegrapes are looking a bit better, but I’m still concerned. I did not include nor yet calculate secondary bud damage, but a glance through the data shows that there are a number of buds with only tertiary or even no buds surviving. We have not yet cut into trunks or cordons, but I suspect that some vines are damaged there as well.

The take home message here for your pruning consideration, is to be cautious but thorough. Consider leaving extra retained buds on your vines this year, I would suggest more spurs rather than fewer but longer spurs. If cane pruning, consider leaving a few extra canes and be wary of bud survival as you move farther out from the basal nodes. It’s easier to thin shoots later than to add back the ones you cut off now. However, you’ll need to be thorough now and as the growing season progresses to remove ALL dead wood from the canopy, including stubs of old spurs, dead cane ends, and ends of cordons. This tissue is where disease inoculum, especially phomopsis, overwinters. Removal of that dead wood is your first line of defense against this disease that seems to be more prevalent than it used to be.

This may also be the year that you’ll need to use those replacement parts that we speak of- I mean renewing trunks and cordons. If there’s a good shoot emerging low on the trunk from last year’s retained renewal spur, keep it. You can cut it later if need be. Same for any healthy canes (i.e. those not dead after the 8-10th node) that emerge from the head renewal zone. Those may be laid down later to regrow cordons if necessary. Trunk and cordon damage may not show for some time, so don’t be too hasty to assume that everything is healthy, and that you won’t need those spare parts this year.

Please read my April 3 post which includes the latest Northern Grapes Project newsletter for more information on assessing bud injury and adjusting pruning.

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

Winter cold and pruning grapevines

April 11, 2014
Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

I just want to drop a quick note to growers after hearing the weather forecast this morning. We have not yet performed our winter bud damage at the UVM vineyard, but will be collecting canes today and assessing tomorrow. I noticed a lot of dead cane ends while walking through the vineyard this week, and I’m anticipating a fair amount of damage to what would be retained nodes. My bigger concern is the roller coaster weather ahead of us. Temperatures are forecast at 75 degrees on Monday, which will surely deacclimate vines to some degree, but the scarier part is that Thursday morning the potential low, according to the European weather model, may be as low as 5 degrees. Vines pruned just prior to that event, especially in a warm spell, will be more cold tender going into that cold morning. I know everyone wants to get out and get their pruning done, but it may be wise to either hold off on pruning early next week. If you really need to get some work done, consider long pruning and leave at least 8-10 nodes that you can remove later.

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

Early season apple disease management

April 9, 2014

Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist
Spring looks to be here, as temperatures are gradually warming up, or at least staying out of the frigid zone. At the UVM Hort Farm, trees are still dormant, although I’ve seen a little swelling on Empire and Macoun. Still, green tip looks to be a week or two off (more likely two) in the Champlain Valley. There’s a great article in the April 7 Scaffolds Newsletter from Terence Robinson and Mario Miranda at Cornell University that walks us through the dormancy and bud development process to predict bud break: http://www.scaffolds.entomology.cornell.edu/2014/SCAFFOLDS%204-7-14.pdf.

In the next few weeks, get your pruning wrapped up, brush pushed out, and sprayers calibrated and tuned up. Leaves can still be flail mowed or urea applied to leaf litter to aid in scab inoculum decomposition. Copper will be ready to be applied any time now that you can get into the orchard. Anyone with concern about fire blight in their plantings should be applying copper at label rates between silver tip and green tip to reduce overwintering inoculum. Copper also acts as your green tip scab spray, so this isn’t an extra trip through the orchard.

To help you plan your 2014 fungicide schedule, here’s nice overview article on Fungicide Considerations for Tree Fruit in 2014 from David Rosenberger and Kerik Cox, also from Cornell University. Go to page four of the March 24 Scaffolds newsletter: http://www.scaffolds.entomology.cornell.edu/2014/SCAFFOLDS%203-24-14.pdf. Remember that the article was written for a New York audience, and so does not reference some of the other fungicide options available to Vermont growers. The SDHI fungicides Luna Sensation and Merivon most come to mind.

Happy spring, now get beck to work!

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

Diversified fruit and veg farm crop insurance: Please read

April 6, 2014
Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

PLEASE consider spending a couple of minutes of your time for this. Ag research only works when its beneficiaries, i.e., farmers, participate. –Thanks, Terry

Jen Miller, a grad student at UVM, is doing a survey examining crop insurance on diversified fruit and vegetable farms as a risk management tool. She is looking for your honest feedback.

This goals of this project are to examine:

– Methods vegetable and fruit growers are using to manage production risk

– Vegetable and fruit farmers’ experience with, and perception of crop insurance policies

– How well crop insurance programs serve vegetable and fruit growers

Responses are being collected from vegetable and fruits farmers in the Northeast.

Please take a few minutes and go to the following link https://survey.uvm.edu/index.php/257185/lang-en

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

Northern Grapes Project: Assessing Bud Injury and Adjusting Pruning

April 3, 2014
Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

I am forwarding this from the Northern Grapes Project mailing list. LOTS of great information to consider as you get into your dormant pruning. In cold years like this one, it is critical to do some bud counts before pruning. -TB

News You Can Use

The Northern Grapes Project is starting a new outreach effort, created at the request of our Project Advisory Council. News You Can Use will provide you with brief, timely information, generated via research conducted as part of the Northern Grapes Project, as well as material derived from other sources. News You Can Usewill be published around the first of every month, and will be sent via email and posted on the project website and Facebook pages. Please let us know what you think!

Assessing Bud Injury and Adjusting Pruning

After the extreme cold temperatures much of the US experienced this winter, many grape growers are concerned about winter injury to buds and trunks. Here in the Finger Lakes region of New York, for example, up to 90% of the primary buds on some V. vinifera cultivars were killed.

Cold-hardy University of Minnesota and Swenson cultivars can withstand much colder temperatures than most other grapes, but it’s still advisable to assess your grapes for winter damage before pruning, and adjust your bud number accordingly. If more than 20% of the buds are dead, you’ll want to leave more buds to maintain a normal cropping level.

Here are some online resources to explore to learn more about how to assess winter injury and manage winter-damaged vines.

Assessing Winter Cold Injury to Grape Buds

Cornell University, Pool and Martinson

(http://www.fruit.cornell.edu/grape/pool/winterinjurybuds.html)

Includes photos of live vs. dead buds, information on how many extra buds to leave when pruning, and links to videos that explain how to evaluate bud damage.

Evaluating Bud Injury and Adjusting Pruning

Cornell University, Martinson

(http://blogs.cornell.edu/nnygrapeupdate/2014/02/28/evaluating-bud-injury-and-adjusting-pruning/)

Blog post with instructions for assessing damage and managing damaged vines.

Cold Injury in Grapevines

eXtension.org, Chien and Moyer

(http://www.extension.org/pages/63372/cold-injury-in-grapevines#.UzwTDPldWJc)

Includes photos of damaged buds and trunks, as well as links to other good resources.

Evaluating Grape Bud Damage Prior to Winter Pruning

Colorado State University, Caspari and Larsen

(http://agronomy.unl.edu/c/document_library/get_file?uuid=912db951-022b-487e-9823-fbb8b5835523&groupId=4128273&.pdf)

This document has photos of the same bud as a series of cuts is being made. This will help you learn what’s too shallow, what’s just right, and what’s too deep.

Ohio Grape-Wine Electronic Newsletter, Special Issue 17 January 2014

Ohio State University, Dami

(http://www.oardc.ohio-state.edu/grapeweb/images/OGEN_17_Jan_2014_Dami.pdf)

Contains information on how to assess for bud damage, how to adjust pruning, and links to other resources. Also includes the article “Pruning Grapevines after Winter Injury” that Dr. Imed Dami wrote for “Wines and Vines” trade magazine a few years ago.

Anatomy of Grapevine Winter Injury and Recovery

Cornell University, Goffinet

(http://www.hort.cornell.edu/goffinet/Anatomy_of_Winter_Injury_hi_res.pdf)

This is a long, and quite technical paper, but has a lot of good photos and in-depth information, including how vines are constructed, what tissues are susceptible to cold, the process of vine cold acclimation, a description of cold injury in the various organs, and the mechanisms the vine uses to heal (if possible) cold-injured structures.

Chrislyn A. Particka, PhD

Extension Support Specialist

Cornell University

Department of Horticultural Sciences

630 W. North Street

Geneva, NY 14456

cap297

315-787-2449 (desk)

315-787-2216 (fax)

www.northerngrapesproject.org

Where trade names or commercial products are used for identification, no discrimination is intended and no endorsement is implied.
Always read the label before using any pesticide.
The label is the legal document for the product use.
Disregard any information in this newsletter if it is in conflict with the label.

The UVM Tree Fruit and Viticulture Program is supported by the University of Vermont Agriculture Experiment Station, a USDA NIFA E-IPM Grant, and USDA Risk Management Agency Funds.

2014 Growing Season Welcome

April 1, 2014

Terence Bradshaw, UVM Tree Fruit and Viticulture Specialist

As I write this at the beginning of the first week of April, it looks like Spring will finally be arriving, but in a form I remember as a kid- a long month of fluctuating temperatures, plenty of ice and slush, and trees showing signs of waking up from their slumber near the end of the month. I’ve always considered April 1 as the day that the growing season officially starts, and many years, that’s about when we get into the field with a tractor for the first time of the year cleaning up prunings. Not this year, but it will come soon enough.

As many growers know, I have assumed responsibility for the UVM Apple and Grape program from the retiring Lorraine Berkett who has served in this role for over 30 years. Lorraine has been an excellent resource for our grower community, with her dual background in entomology and plant pathology, and her work has certainly helped Vermont growers maintain sustainability while managing pests on the orchard. My background is more diverse: I am neither an entomologist nor plant pathologist, yet I have worked with Lorraine for nearly 20 years at UVM and that experience will inform my newsletters to you. In addition, I have been the default horticulturalist with the program for nearly 10 years, so my reports will contain more information from that area. As a jack-of-all-trades, I will rely on my observations from the UVM orchards and vineyard and any I visit, as well as information from regional experts to offer a well-rounded outreach program that supports our tree fruit industry.

In my new appointment at UVM, I do not have a formal Extension component, but I have received a USDA Extension-IPM grant to provide outreach services to apple and grape growers in the state. Feel free to contact me with your questions during the season, preferably by email (tbradsha). I will be issuing regular email and blog updates (see below) during the season, with less of a reliance on the traditional newsletter format where information is held until compiled together in a regularly scheduled issue. Let me know if this system is working out as the season goes on, I appreciate and need to feedback.

New UVM Fruit Website

My colleague Sarah Kingsley-Richards has been hard at work setting up a new website for our programs and migrating content over. Our old websites (http://orchard.uvm.edu, http://pss.uvm.edu/grape) were designed in the early 1990s and 2000s, respectively, and have served us well. However, web standards have moved on, and it was time to get our information together into a more usable format. In addition, the website for our Organic Apple Production project, http://www.uvm.edu/~organica, has existed in isolation since its launch in 2006. Each of those sites will remain for the time being as archive sites, but will no longer be updated.

The new site, http://www.uvm.edu/~fruit, will serve as a gateway for small fruit, tree fruit, and grape producer information. The small fruit tab will direct users to Vern Grubinger’s Vermont Vegetable and Berry page, while tree fruit and viticulture information will be housed within the site itself. We don’t have everything migrated over from the old sites yet, but this should be your first source for any new information coming from our program.

We also have developed a companion blog site, skingsle to get on the list. The latest blog posts will be featured on the homepage of the UVM Fruit website to help users keep abreast of any new information. Blog posts are sorted by categories that can be selected on the right side of the main blog page.

Both the UVM Fruit website and blog feature responsive web design. That means that the sites will adapt to fit various screen sizes, whether on a desktop computer, tablet, or smartphone. Work on this site redesign is funded with a grant obtained through the Vermont Specialty Crops Block Grants Program.

Finally, another site of importance for fruit growers is the Cornell Network for Environment and Weather Applications (NEWA) site, http://newa.cornell.edu. Vermont has been a partner with Cornell on this site since 2010. The site collects weather data from stations located at farms and airports to generate real-time pest management models that can help growers make decisions in the field. The Vermont NEWA network consists of eight weather stations located on farms (Calais, Dummerston, East Dorset, Putney, Saxtons River, Shoreham, South Burlington, and South Hero) and six airports (Bennington, Burlington, Montpelier, Morrisville, Rutland, and Springfield). On-farm stations feature temperature, relative humidity, rainfall, and leaf wetness sensors, which allow users to run all models on the site. Airport stations lack leaf wetness sensors, so some models, such as apple scab, will not run. Users should select the site closest to their farm, with the caveat that local meso- and microclimates may affect the actual weather conditions on your farm. Remember, however, it is only a model, and will serve as one piece of information in your decision-making process. Site and station reliability are very good, but internet connectivity and station readiness can occasionally be fussy, so you should have a good knowledge of your pest management decisions on your farm rather than relying solely on NEWA to make you decisions for you.

2014 New England Tree Fruit Guide is Available Now

The 2014 New England Tree Fruit Management Guide is available for order now. This guide represents the work of IPM professionals throughout New England, and is our primary resource for IPM and general production information available to growers. If you think your old guide will cut it, it won’t. There have been numerous changes in product registrations and recommendation in recent years, and an up-to-date guide is your best investment in helping to keep your management program up-to-date.

Guides are $40 each, delivered. We are not set up to accept credit cards, so interested growers can print this email out and send a check for $40 payable to “University of Vermont” (nothing else goes on the to: line) to:

Sarah Kingsley-Richards
UVM Plant & Soil Science Dept
63 Carrigan Dr
Burlington, VT 05405

Please give your:

Name: _________________________

Orchard Name: _________________________

Mailing Address: __________________________

Summer course at UVM on Orchard and Vineyard Management

Registration is open now for PSS 195: Sustainable Orchard and Vineyard Management, offered at the University of Vermont this summer. Classes will be taught on Tuesdays and Thursdays 9:00 am- 3:00 pm from June 16-July 11. Students will learn principles and practices of commercial orchard and vineyard crop production, including: site selection and preparation; cold hardiness development; varietal selection; tree and vine training and trellising systems; cold hardiness development; nutrient, water and pest management; harvest and postharvest considerations. Special emphasis will be placed on environmental and economic sustainability of fruit production systems.

The course will cover both orchard and vineyard crops suitable for production in northern New England, and students will have opportunities to explore specific crops in greater depth if they so wish. At each course meeting, we will apply knowledge of integrated horticultural and pest management practices in a real farm setting.

Registration is open to both undergraduate and non-credit students. For more information, contact Instructor Terence Bradshaw (contact information is listed below) or go to:

http://www.uvm.edu/~summer/course-detail/?crn=60793

__________________________________________________________________

April 8th Northern Grapes Webinar

March 21, 2014- The Northern Grapes Project Webinar Series

“Impact of crop load and training systems on viticultural and enological performances of Marquette and Frontenac grown in Michigan and New York”

April 8th, 2014

12:00 Noon Eastern (11:00 am Central)

7:00 pm Eastern (6:00 pm Central)

Tim Martinson of Cornell University and Paolo Sabbatini of Michigan State University will discuss results from vineyard trials conducted as part of the Northern Grapes Project. In New York, two years of training system trials on Marquette and Frontenac indicated that high training systems (Top Wire Cordon and Umbrella Kniffin) produced up to twice the yield with less labor inputs than Vertical Shoot Positioning. Fruit composition indices show modest reduction in soluble solids, but little impact on titratable acidity or juice pH. Individual sunlight-exposed Frontenac clusters had higher brix and lower titratable acidity than shaded clusters, across all training systems. In Michigan, training system (Top Wire Cordon, Geneva Double Curtain, and the experimental Moving Trellis) and crop load (cluster thinning) trials were conducted on Marquette. Spring frosts in 2012 impacted results and fruit chemistry was very good overall. In 2013, crop load studies indicated a large impact of cluster thinning on canopy growth and architecture. Despite the large difference in yield, minimal impact was observed on fruit chemistry.

Registration is NOT required if you received this email directly from Chrislyn Particka, as it means that you are a member of the Northern Grapes Webinar mailing list.

All members of the Northern Grapes Webinar mailing list will receive an email the Monday before the webinar containing the web address (URL) for both webinar sessions as well as connection instructions.

If you have received this email from someone other than Chrislyn Particka, you need to register via the link below:

 http://northerngrapesproject.org/?page_id=254

Registering for one Northern Grapes Webinar will place you on the mailing list, and you will receive announcements and connection instruction for all further Northern Grapes Webinars.

Registration will close at 8 am (Eastern) on Monday, April 7th.

Feel free to email Chrislyn Particka (cap297) with any questions, if you want to check your registration status, or if you’d like to be removed from the Northern Grapes Webinar mailing list.

Further Northern Grapes Project information is available on-line at

 http://northerngrapesproject.org/

The Northern Grapes Project is funded by the USDA’s Specialty Crops Research Initiative Program of the National Institute for Food and Agriculture, Project #2011-51181-30850 and through the New York State Specialty Crops Block Program.

Chrislyn A. Particka, PhD

Extension Support Specialist

Cornell University

Department of Horticultural Sciences

630 W. North Street

Geneva, NY 14456

cap297

315-787-2449 (desk)

315-787-2216 (fax)

www.northerngrapesproject.org

Survey on Apple Scab Resistance

March 21, 2014- I’m passing this on from some colleagues who are pulling together a grant to develop a rapid fungicide resistance test for apple scab. Please consider spending five minutes to answer the survey. This is important work that is worthy of funding. -TB

Apple pathologists in New England and New York would like to know how apple growers rate the importance of fungicide resistance and whether they are trying to manage it. The following short survey will help us a great deal. If growers do report fungicide resistance as an important issue in their orchards, we will use the information as justification to apply for research and education grants to address the problem.

The survey should take less than 5 min. We greatly appreciate your willingness to give us this very useful information.

Dr. Dan Cooley, UMASS and Dr. Kerik Cox, Cornell University

https://www.surveymonkey.com/s/MFFGZWR

Courses for instruction on Diversified Farm Management at UVM Summer 2014

March 18, 2014- This series includes my course on Sustainable Orchard and Vineyard Management. -TB

UVM Educational Farm Expands Learning Opportunities for Students
Catamount Farm to provide dynamic environment for wide range of students

By Erica Houskeeper

A new farming education endeavor at the University of Vermont will give students the opportunity to learn about sustainable farm practices, contribute to the local food system and help support research needs of the university.

Catamount Educational Farm in South Burlington will offer an extensive hands-on farm experience for post-traditional, undergraduate and high school students. Produce grown at the farm will be sold to select outlets within the UVM community, including University Dining Services, and be available at the UVM farm stand and through a CSA.

Catamount Educational Farm is located at the UVM Horticulture Research and Education Center (HREC) on land that has been owned by the university for more than 60 years. After three successful years of the UVM Farmer Training Program managing three acres of vegetables at the HREC, UVM Continuing and Distance Education and the UVM College of Agriculture and Life Sciences created the Catamount Educational Farm by designating 13 acres for specialty crop production and academic programs.

“The establishment of Catamount Farm will allow UVM to provide a dedicated, hands-on learning environment for students seeking diverse farming and management skills on a well-managed, productive farm,” said HREC Director Terence Bradshaw. “Since its purchase in 1952, the mission and vision for the ‘Hort Farm’ has been to provide research, education and outreach. Catamount Farm fulfills that mission and effectively moves UVM’s local food system efforts to the next level.”

Catamount Educational Farm consists of five acres of diverse vegetables and eight acres of apples and grapes. The farm will continue to be home to the UVM Farmer Training Program for post-traditional students, as well as offer new courses such as the Catamount Farm Summer Experience for undergraduate students and the Introduction to Sustainable Vegetable Farming for high school students.

“Catamount Farm will provide a dynamic environment for immersive, experiential and relevant programs,” said Susie Walsh Daloz, who develops sustainable farm programming for UVM. “The expanded farm also allows us to reach a wide range of students, who now have the incredible opportunity to study sustainable farming while producing food for the UVM community.”

Students will be integral to carrying out all activities of the farm, providing them with real and diverse sustainable farm management skills.

“What’s unique and valuable at Catamount Farm is that production and education will go hand-in-hand,” said Laura Williams, manager of Catamount Farm. “Catamount Farm is so much more than a demonstration farm, and that’s what makes us remarkably different.”

For more information about Catamount Educational Farm, visit learn.uvm.edu/catamountfarm.

Input Needed on Proposed EPA Worker Protection Standard Changes

March 18, 2014- On February 20, 2014, the Environmental Protection Agency announced proposed changes to the agricultural Worker Protection Standard (WPS) to increase protections from pesticide exposure for the nation’s 2 million agricultural workers and their families. This is an important milestone for the farm workers who plant, tend, and harvest the food that we put on our tables each day.

You can view the proposed changes and how to comment on them at this link: http://www.epa.gov/pesticides/safety/workers/proposed/index.html. Wherever you stand on the issue, this is an important potential change in current policty that could have significant implications for your farm.

-Terry

proposed-wps-factsheet.pdf