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| Crop Update - 7/26/2007 | |||
| Back to the Lake Erie Regional Grape Program Home Page | |||
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UPCOMING EVENTS REMINDER:
Chamber of Commerce Federal Congressional Lunch with Congressman Brian Higgins Wednesday, August 8, 2007 Chautauqua Golf Club, Route 394 in Chautauqua Registration begins at noon followed by lunch and presentation at 12:30 PM. Cost to attend is $15 for chamber members and $20 for non-members. Pre-registration is required. Reservations may be made on-line at www.chautauquachamber.org or by calling the Chamber at 716-366-6200 or 716-484-1101. Twilight Meeting and Pig Roast - NYS DEC, NYS Department of Labor and Border Patrol Updates Wednesday, August 15, 2007 Thompson Ag, Silver Creek, NY The meeting is free of charge but Reservations are required for the pig roast to ensure that we have enough dinners for everyone. Please contact Linda at the LERGP Fredonia Office at (716) 672-5296 no later than August 8 to let her know you will be attending. NY Agriculture Commissioner to Speak at Sustainable Agriculture Tour Friday, August 17, 2007 Tour will begin: 10:00 a.m. at the Dutch Road Dairy, operated by Matthew and Nancy Beckerink in Findley Lake; lunch, to be held at 12:30 p.m. at Cross Roads Farm & Craft Market in Westfield; 2:30 p.m., the tour will visit the Betts Farm, operated by Robert and Dawn Betts in Westfield. There is a $7.50 registration fee for lunch. Menu choices include Italian sausage, hamburgers, or cheeseburgers, along with salads, vegetables, fruit, and beverage. Advanced reservations are required for lunch by calling (716) 664-2351, extension 102 on or before August 14. Succeeding with Cabernet Franc 2007 Tuesday, August 21, 2007, 9AM - 4:30PM Berks County Extension Office, 1238 County Welfare Road, Suite 110 Berks County Ag Center Leesport, PA 19533-9709 |
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| Grape Integrated Pest Management | Tim Weigle |
Grape Berry MothThis is the week you should all be out looking for grape berry moth in low and intermediate risk vineyards using the Grape Berry Moth Risk Assessment Protocol (to view the protocol follow this link http://nysipm.cornell.edu/publications/grapeman/files/risk.pdf). Vineyards that have been classified as being high risk for grape berry moth damage would typically have an insecticide applied in the last week of July/first week of August time frame without any scouting. However, with the limited amount of damage we are seeing this year, you might want to take the time to complete the scouting routine in your high risk blocks as well. Vineyards that have been categorized as extremely high risk (not in the GBM RA protocol but a category we have come up with to describe vineyards, or areas of vineyards that are ravaged by GBM each year) can be scouted but will probably still need an insecticide applied. Since we have been in the situation before where no damage at this time of year has been followed by significant damage from Grape Berry Moth late in the season, it is strongly suggested that you do not walk away from vineyard blocks that appear clean at this time. Our pheromone trap catches dropped significantly indicating a lull between generations a few weeks ago and we have not seen an notable increase in trap catches to indicate the next generation is upon us. We are also doing damage assessments and are finding very little damage (below the third week of July 6% damaged cluster threshold of the GBMRA) in the high risk vineyards we are checking. When scouting be sure you are documenting grape berry moth damage and not any of the other types of berry damage we are seeing this time of year. During a recent scouting outing we found banded grape bug (Figure 1) which usually is identifiable as black spots which are starting to slough off at this time of year, thrips which leaves rough looking tannish spots, streaks or blobs (Figure 2), hail damage which should be starting to callous off by now (Figure 3) or black rot which we are seeing a bit of old infections just starting up in vineyards. The new infections from black rot that I saw yesterday (from infection periods at least 2-3 weeks ago) have typically not enveloped the entire berry yet. One way to assist in identifying it as black rot is to look for a whitish dot (the initial infection spot) with purplish/brown discoloration around it (Figure 4). You may also be able to see small black dots starting around the white spot which are the pycnidia that will house the newly formed spores/inoculum. |
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 Figure 1. Banded grape bug |
 Figure 2. Thrips 
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 Figure 3. Hail damage in Traminette  Figure 4. Black rot infection |
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Grape berry moth damage is fairly easy to spot this time of year as you should be able to find a small entrance hole where the larvae began feeding surrounded by a purple discoloration. Sometimes, if the feeding took place early enough, the berry will start to split. You may also be able to see black tunnels just under the surface of the berry where the larva has been moving through the berry while feeding. If you have any questions on determining just what is damaging your berries, please give me a call and I would be happy to assist you. |
 Grape berry moth damage |
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| In the Vineyard | Andy Muza |
| Insects and Diseases observed in vineyards this week include: | |
| Grape berry moth - GBM pheromone trap counts continue to be low this week. Growers are reporting that they are having a hard time finding much injury from GBM feeding even in their high risk sites. Injury levels at sites that I have examined this week also remain low. Even though population levels are currently low, high risk sites should still receive an insecticide application in early August due to the past history of injury at these sites. Blocks with rows parallel to the woods can be sprayed 8 - 10 rows from the wooded edge while perpendicular rows need to be protected at least 3 post lengths from the edge. | |
 Grape berry moth pheromone trap |
 Grape berry moth injury on Concord berries |
| Japanese Beetle - the major topic of concern continues to be Japanese beetle. Due to high population levels across the region many blocks have received an insecticide application and some Concord sites have received two. Scout to determine the extent of leaf injury and current population levels and consider crop size before deciding if an additional application is economically worthwhile. |  Japanese beetle feeding injury on Concord leaves |
| Powdery mildew - levels remain low at sites examined. Growers are also reporting low levels in their vineyards. | |
| Downy mildew - at this point the greatest potential disease threat is for varieties susceptible to downy mildew (e.g., Niagara, Fredonia, Chancellor, etc.). A chance of thunderstorms are expected over the next 4 days and this could initiate problems in susceptible blocks. | |
| Refer to the 2007 New York and Pennsylvania Pest Management Guidelines for Grapes. | |
| Update from North East, PA | Bryan Hed |
| Here is a brief update from the lakeshore in North East PA. |
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Weather: |
| Phenology: An assessment of Concord berries on July 24 revealed that size and weight has flattened with no change since last week. |
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Diseases: Phosphorous acid products like Prophyt and Phostrol will provide good pre infection protection and even better post infection control of downy mildew. Other effective materials include Ziram, Copper, and Ridomil. Scouting areas of your vineyard starting with those blocks that you know to be most prone to disease development is an efficient way to determine your level of risk and either resist the urge to make unnecessary fungicide applications or prevent economic damage to your crop. Powdery mildew is beginning to show up on Concord leaves. At our location, I am observing sporulating colonies on interior leaves and some distortion on new leaves. Exterior leaves, even on unsprayed vines, are clean. Historically, the intensity of this disease is a bit behind what we normally observe by late July. |
| Weather Facts | Tim Weigle and Edith Byrne |
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| The weather proverb this week is: |
| A sunshiny shower won’t last half an hour . . . |
Sustainable Viticulture Workbook Project
We continue to hear from growers and are still asking for more volunteers to go through the workbook, answering the questions that pertain to them (and let us know what questions do not pertain to their operation)! Please let us know if you are interested by emailing Edith (emb35@cornell.edu or grape@netsync.net)! We would love to hear from you.
Update - We have met with growers from Chautauqua, Niagara, Cattaraugus Counties in New York and several growers from PA. for this project which is a cooperative effort of growers, processors, the Finger Lakes Regional Grape Program, Long Island Grape Program and the Lake Erie Regional Grape Program.
Going over the questions in the workbook typically takes about 90 minutes. Depending on your operation and the type of grapes you are growing doesn't make any difference either - we are interested in everyone's input, no matter how many acres you have. Once you have completed the first phase of going through the workbook and answering the questions scaled from 1 (best practice) to 4 (should look at this practice to see if it can be improved), a follow-up visit is scheduled with a member of the SWCD from your county (they have the money to help with cost sharing) to discuss how you might be able to move the practices that received a rating of 4 to a rating closer to 1 - this is the Action Plan meeting.
The workbook questions are painless, self-reflective and the comments made by growers' are very positive - including how going over the questions makes them think about their total operation, or how they might be able to do or think about something differently, etc.
We have appointments set up with more growers through the month for both the workbook portion and Action Plan meetings... If you are interested in working with us on this project please send Edith an e-mail or give her a call at 716.672.6830 so she can schedule an appointment with you.
Lake Erie Regional Grape Program Extension Team Members:
| Andy Muza | Extension Agent, Erie County, PA Cooperative Extension | (814) 825-0900 |
| Tim Weigle | Sr. Area Extension Educator, Grape IPM | (716) 672-6830 |
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any questions or comments on the format of this update please contact Tim Weigle at: timweigl@netsync.net |
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The Lake Erie Regional Grape Program Website is maintained by the NYS Grape IPM Program |
| 412 E. Main Street, Fredonia, NY 14063 | Telephone: 716-672-5296 | E-mail: Webmaster |