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Ohio Grape-Wine Electronic Newsletter

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Ohio Grape-Wine Electronic Newsletter Ohio Grape-Wine Electronic Newsletter Editor: David Scurlock, Viticulture Outreach Specialist Department of Horticulture and Crop Science Ohio Agricultural Research and Development Center 1680 Madison Avenue Wooster, OH 44691-4096 www.oardc.ohio-state.edu/grapeweb/ 30 April 2015 (11) Content: Congratulations Greg Johns! New herbicide for weed control in vineyards Sensitive Crop Registry Grape bench grafting Buckeye Appellation-new grape website OARDC Vineyard Update Winter injury assessment at Piketon South Centers SWD Webinar Know Your Grape and Wine Experts Greg Johns, The Ohio State Ashtabula Agriculture Research Station Manager, Retires after 30.5 years of Service by Dave Scurlock, OSU/OARDC Viticulture Outreach Specialist A retirement celebration was held yesterday April 29 2015, at Hundley Cellars in Geneva, Ohio for the Ashtabula Agricultural Research Station manager Greg Johns. The event was hosted by owners Tracey Hundley Pringle, parents Larry and Gerri and Tracey’s Brother Greg, who made and served up the World’s Best Hor d’oeuvres! Greg started his long career with Ohio State University and ended it with The Ohio State University. Greg is one of biggest Buckeye Fans in Buckeye Nation attending OSU football games religiously with his son Alex. Greg was the first and only person to manage the AARS Branch which was started in 1985. Greg has worked with many OSU researchers starting with Dr. Garth Cahoon, who I refer to as the Grape Voice of Ohio. Dr. Dave Ferree, a world renowned pomologist ran the viticulture program from 1993-2004. Dr. Dave Ferree carried on the rootstock research that Dr. Garth Cahoon had started. This research tested 8 different rootstocks on 2 varieties of grapes, Riesling and Cabernet franc, to test which rootstock produced the best vine and grape possible. The reference to this publication of Dr. Dave Ferree can be found at: Ferree, D.C., G.A. Cahoon, M.A. Ellis, D.M. Scurlock and G.R. Johns. 1996. Influence of eight rootstocks on the performance of ‘White Riesling’ and ‘Cabernet Franc’ over five years. Fruit Var. J.50(2):124-130. This work and the findings are still the recommendations to this day. Dr. Roger Williams along with several of his graduate students performed various insect research experiments. Dr. Mike Ellis’s research experiments at AARS and OARDC help bring the grape industry into the 21st century with his preventative spray programs that helped to improve the quality of grapes throughout Ohio. Dr. Joseph Scheerens had a research plot on brambles at the AARS for a period of time. There are too many research experiments that have been performed at the AARS and Greg has been intimately involved with all of them. Greg has also held workshops at the AARS for school children and worked closely to hire disabled children who have helped at harvest time. This really means a lot to these individuals to instill respect and accomplishment of a job well done. All of us who have worked with Greg over his career owe an immense debt of gratitude for all he has done to advance the growth of the grape and wine industry in the State of Ohio. We wish him well as he embarks on his next career. Greg established his own vineyard and has vowed to be an intimate part of the grape industry in many different capacities. I have included a pictorial of Greg’s retirement reception at Hundley Cellars for those of you who could not attend. Thank you Greg from Buckeye Nation. Ken Scaife, OSU/OARDC Outlying Branch Manager, delivered a presentation and plague to Greg for his service to the grape and wine industry which can be seen on the link below. http://www.youtube.com/watch?v=CujKZD8AkDA The following pictures were taken by Dave Scurlock at Greg John’s Retirement Reception hosted by Hundley Cellars. Enjoy! Greg, We Wish you ALL THE BEST! New Herbicides for Weed Control in Vineyards 1 2 Mohsen Mohseni-Moghadam and Douglas Doohan 1Postdoctoral Researcher 2Professor and State Specialist Department of Horticulture and Crop Science, 1680 Madison Avenue, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster, OH 44691 Weed control is part of an overall vineyard management system and is essential for the establishment of newly planted vines. Weeds have negative effects on the crop by competing for light, water, and nutrients. They can reduce the quality and/or yield as well as cause problem during crop harvest and serve as hosts to insects and diseases. A successful weed management program can improve the growth and yield of established vines. There are many tools, including chemical and non-chemical, available to the growers to achieve control in their vineyards. There are many important factors to consider in chemical weed control. One of the most important is site preparation, which should start 2 years before planting. Knowing the crop, weed, and herbicide history before planting can be very useful for making the right decisions for site preparation. Fields that have been in row-crops may or may not require extensive measures to kill perennial weed rhizomes and rootstocks before planting grapes, depending on the degree of weed control maintained up to the time of planting grapes. In contrast, abandoned land, pastures, hayfields, and poorly managed row crops will require a particular prolonged focus on weed control before planting a single grape vine. Fields such as these must be tilled to break dormancy in perennial weed rhizomes and/or rootstocks. Tillage will stimulate their growth and create the conditions favorable for actually killing them. Once weed growth has occurred and perennials have reached the appropriate growth stages cultivation, smother crops, and herbicides such as glyphosate can be used to kill the underground propagules. Before planting vines consider establishing an inter-row cover crop such as tall fescue. A weed-suppressive, rutting- resistant cover crop may take up to 18 months to fully establish. Once grape vines are planted, the right herbicide must be chosen and applied at the appropriate time using the correct rate. PRE and POST herbicides for broad spectrum weed control after transplanting can also be used to prevent re-infestation. Keep in mind that for a successful weed management and control program you must incorporate other herbicides in Year 2 and beyond. It is also critical to implement a comprehensive cleanup plan that prevents ‘misses’ (the inevitable weeds that are not controlled by an herbicide application) to go to seed. Here we summarize some recent registrations that could be part of a complete herbicide program for your vineyard. None of the herbicides mentioned below will control all weeds, and must be part of a broader program. Zeus XC: Zeus XC is a selective soil-applied herbicide for the control of susceptible broadleaf (i.e. redroot pigweed, common purslane, common lambsquarters), grass (i.e. green and yellow foxtail, large crabgrass) and sedge (i.e. purple and yellow nutsedge) weeds. Zeus XC is a 4 pound per gallon containing the active ingredients sulfentrazone. It should be applied as a broadcast soil application to vineyard floors or as a uniform band application directed to the base of the trunk in vines to provide preemergence control of weeds listed on the label. For broadcast applications, a single application of Zeus XC should be made at 8-12 fl oz per acre. When applied as a banded treatment (50% band or less), refer to the formula in the label for rate and volume. Zeus XC may be applied twice per year. Do not apply more than 12 fl oz product per acre (0.375 lb ai/A) on a broadcast application basis per year. Zeus XC should only be applied to crops that have been established for 3 growing seasons and are in good health and vigor. For best control, Zeus XC should be applied before weeds emerge. If weeds are present, tank mix with a postemergence herbicide to eliminate emerged weeds. Avoid direct or indirect spray contact with crop foliage and fruit. Any contact of the spray solution on the green bark of trunks of young vines must be avoided by wrapping the trunk with a nonporous wrap, grow tubes, or wax containers. Zeus Prime XC: This is a selective herbicide that provides postemergence contact and soil residual weed control. It may be applied as a burndown and or preemergence application before or after weed emergence for control of susceptible broadleaf weeds. Zeus Prime XC is a 3.5 pound per gallon containing the active ingredients carfentrazone-ethyl and sulfentrazone. Zeus Prime XC should be applied as a uniform broadcast soil application to vineyard floors or as a uniform band application directed to the base of the vines (avoid contact with green foliage) to provide preemergence control of weeds listed in the label. For broadcast applications, a single application of Zeus Prime XC should be made at 7.7 to 15.2 fl oz per acre. Do not apply more than 15.2 fluid ounces per acre per twelve month period. Zeus Prime XC should only be applied to crops that have been established for two growing seasons and are in good health and vigor. For improved weed management, Zeus Prime XC can be applied in a tank mixture with other preemergence and postemergence herbicides. Alion: This is a preemergence herbicide for control of annual grasses and broadleaf weeds in grapes. This herbicide may be applied to the soil as a uniform broadcast or band application for the prevention of new weed emergence. Alion is 1.67 lbs per gallon containing the active ingredient indaziflam. A single application of Alion should be made at 3.5 to 5 fl oz per acre.
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