Virginia Grape Disease Updates

  I think many readers of this blog subscribe to Tony’s viticulture note, but just in case, here is some information that you may be interested in. The second Sentinel Vineyards Report is out now.  The report is attached at the end of this post.  Make sure to subscribe to Dr. Beth Chang’s Blog here:  https://sites.google.com/vt.edu/vtenology/home Two upcoming meetings: New Grower Workshop 4 November 2021 at Winchester VA Team taught sessions for new grape growers and those considering developing a wine grape vineyard in the Mid-Atlantic.  Registration is required ( and the deadline is this Friday! ). Please click the link below.   https://register.ext.vt.edu/search/publicCourseSearchDetails.do?method=load&courseId=1600122 Virginia Wineries Association Annual Meeting November 15 & 16, 2021 Hybrid event: in-person (Richmond, VA) and remote virtual options The technical session theme on Day 2 is “Wine Stabilization – ...

Thanks again to those of you who made it to the meeting. It was nice to have a face-to-face meeting after the whole thing we are in together. Here's my handout from today's meeting.  It will open a new window with a pdf file.

Thank you again for participating in our meeting. Please find two materials from today's presentation. 1) List of short PHI fungicides for late-season diseases (will open a pdf file) 2) Today's presentation (will open a pdf file). Have a good rest of the season, and hope to see you next week at the VVA summer technical meeting!!

Presentation slides Thank you to those of you who were able to make it to the meeting today. Here are slides from today's presentation (open PDF).  Up-coming meetings Eastern Section American Society for Enology and Viticulture annual meeting (7 – 8 July): The ASEV/ES meeting will occur on-line this summer. See https://www.asev-es.org/ for details on the meeting, which will include research presentations and a panel discussion entitled “Future Grape Cultivars for Eastern North American Growers”. Eastern Viticulture and Enology Forum (13 July): The July 13th meeting is the next of a series of 4 virtual meetings organized by viticulture and enology extension specialists at Penn State, Cornell, and Virginia Tech. In addition to regional round-ups of seasonal progress, specialists from around the eastern US address pre-submitted questions from participants. Registration instructions and additional information about the meetings can be found on the attached Word document. Virginia Viney...

 Thank you to those of you who were able to join us today. Here are some of the items we discussed. Slides from today's presentation (will open a pdf file in a new window) RSS feed address for this blog (I posted under "Resources" too) You can also subscribe via email using the menu showing on the upper left part of this blog. Google will drop the email subscription service in July, but I will come up with another way to send you reminders. Thus, if you wish to be included after July, please go ahead with the subscription service. Link to my grape disease management workshop presentation videos. Please note that the closed captioning is most likely not working. I created CC with the Canvas site we used in the workshop. If you wish to watch them with CC, please send me an email so that I can send an invitation to Canvas site. Unfortunately, I don't have time to work on YouTube version right now. I will focus more on YouTube version next year. I will keep it available f...

Upcoming virtual vineyard meetings The viticulture group at the AHS Jr. AREC will be hosting a series of four monthly, on-line viticulture meetings starting Thursday, 22 April 2021. The content of each meeting will vary somewhat and will involve extension specialists who will provide seasonal updates on vineyard management, pest management topics, and emerging weather, pest or disease issues. An initial topic of each of the 4 planned meetings will be a statewide grape development roundup gathered from our “sentinel vineyard” cooperators located around the state. Each meeting will last about 2+ hours, starting at noon.  At this point, the meetings will be on-line, but stay tuned for at least one on-site meeting which we plan to host at the AREC in late-July.  The meeting dates (noon start) are: 1)     April 22, 2021 12:00 PM (EDT) Register in advance for this meeting: https://virginiatech.zoom.us/meeting/register/tZ0pceigqTMrGdOSA5D6uvJUEfYaVZKLVER7 After registe...

If you wish to attend upcoming grape disease workshops and grapeIPM.org training, please register using this form (CLICK this line) so that I can send you an invitation to the lecture materials.  Grape Disease Workshop (3/31/21):  I prepared a series of lectures to cover basic concepts and terminologies, which I often not able to explain due to the time limitation. Also, a short version of my "usual" workshop is now recorded. In my workshops, I assume you know some concepts and terms, so, if you are not familiar with some terms such as disease triangle, curative fungicide, QoI fungicide, FRAC group, fungicide resistance, biological control agent, etc, please check out the lectures.  Each lecture runs less than 20 min, with an exception of the main workshop content, which runs around 26 min. If you do not have time to watch them all, please watch the main workshop content. On March 31st at noon , we will use Zoom to communicate. The link to the Zoom se...

As noted in the previous post, there will be a series of workshops coming up this and next month. March 16th (1 - 4 PM): Grape IPM workshop This is a lecture-style meeting where we cover topics in disease, insect, and weed management, WPS, and Viticulture March 31st (12 - 1:30 PM): Grape disease management workshop (in English) This workshop aims to help you plan your disease management plan. We will go over seasonal disease management together. April 1st (12 - 1:30 PM):  Grape disease management workshop (with Spanish translation) This workshop aims to help you plan your disease management plan. We will go over seasonal disease management together. April 9th (12 - 1:30 PM): GrapeIPM.org training This is a training session for a new online pesticide management and decision support system for grape growers. We will help you set up accounts and first vineyard(s), demonstrate key functions, etc. For the grape disease management workshops on 3/31 and 4/1 and grapeIPM.org training on 4/...

Thanks again to those of you who were able to attend my workshop last Friday. As we discussed, here is the slide set from my presentation (pdf, opens a new window) .  We are also planning to have several meetings in March and April. All will be online events. March 16th: Grape IPM workshop  March 31st: Grape disease management workshop (in English) April 1st:  Grape disease management workshop (in Spanish) April 9th: GrapeIPM.org (online pesticide management tool) workshop In the grape disease management workshops on 3/31 and 4/1 and grapeIPM.org workshop on 4/9, I will provide you a series of online lectures that you can watch before the meeting. At the meeting, I will go over the key items, and we will spend most of the time with Q and A and discussions. I will post more information and ask Tremain to distribute information once we have set time and format, so, please stay tuned.

I have updated my fungicide application template that I have been using for my fungicide guides. If you are interested in it, download it from this link.  This will open a new Google Doc page, which  says it is "View Only"; however, you can download the file. Select "File" from the top menu of Google Drive, and you will see the "Download As" submenu which has several options for the file type. Many thanks to Mr. Bob Romsey who shared the original template with me! Please note that this is just a template. Your program will differ based on what you see in your vineyard(s). Please use it with VCE's Pest Management guide or Southeastern IPM guide (linked under "Resouces"). Speaking of the Southeastern IPM guide, I created modified tables  that consist of a list of commonly used fungicides in the vineyard with their FRAC codes and fungicide resistance risks, and a template for the spray program. I hope these materials will help you organize your ...

Thank you to those of you who were able to join our virtual meeting today. Please click this link for a copy of my presentation (will open a new window with a pdf file). The link to the trunk disease web application is here (will open a new window) . There was a discussion in the chatbox on Topsin-M's new federal label, which includes the paint and spray application to pruning wounds. This means that you no longer need to use the special (18c) label for the dormant application. Please click this link to download the new label for your record (will open a new window) , if you wish to use Topsin-M to protect pruning wounds. The label has been approved by the VDACS for use in Virginia. If you have vineyards in other states, please check with the local extension office. The list below shows upcoming meetings in the next few months. We will come up with dates for IPM workshops soon. Eastern Viticulture and Enology Forum  Cornell and Penn State Extension are teaming up to create the Eas...

Tremain and I will be participating in an upcoming webinar on January 13th, 2021, which is hosted by PSU. It will start at 10 AM, and we are planning a 2-hour meeting to cover pruning related topics. Please join us, if you have time. You need to register to receive an invitation. https://extension.psu.edu/dormant-grapevine-pruning-workshop-and-commercial-grower-panel Also, please take some time to answer our survey on ripe rot!

With recent rain events and warm and humid nights, the risk of downy mildew and Botrytis are probably high in many areas of Virginia. For example, I counted seven days (at Winchester, VA) and eleven days (at Rustburg and Scottsville, VA), with downy mildew infection events in the past two weeks according to the NEWA model ( http://newa.cornell.edu/ ). It is very important to keep your vines protected, and if you think you need to have a kick-back activity against downy mildew to counteract the recent rain event that your previous spray might not have provided good coverage, add a phosphorous acid material such as Prophyt or Phostrol.  Please refer to this list of materials with short PHI since some of the cultivars are getting very close to harvest. Note: although both sulfur and copper have a short PHI, we typically do not recommend spraying these materials within 3-4 weeks of harvest due to its potential negative impacts on the fermentation or wine quality.  When some ...

Thanks for attending today's online Extension meeting. Please find the materials I discussed today below. 1) Presentation slides (will open a new window with a pdf file). 2) List of short PHI materials for Botrytis, powdery mildew, and downy mildew.

Thanks for all who were able to make it to our virtual meeting this afternoon! The file below is the slide set I used today, the link will open a pdf file in a new window. Critical time *very quick* grape disease management reminders  - please see the previous two presentation slides for more information! 1) June 4th meeting , 2) PSU meeting .

Thanks for all who were able to make it to our virtual meeting this afternoon. The file below is the slide set I used today, the link will open a pdf file in a new window. Grape disease management reminders, 4 June 2020

Thank you for those of you who were able to join the webinar today. You can access the slides from today from the link below (will open a new window with a pdf file). PSU Grape management reminders from bloom through bunch closure (5/27/20) Please see this posting for how to access the Google sheet that I showed during the webinar.

It took a while, but I think I figured out how to share the recodings. If you click the line below, each opens a new window with the video recording of the workshop. If you are wondering why I am pausing here and there, I was reading questions from the chatbox. 1) GrapeIPM.org short training and Q and A (10 April 2020). 2) Grape fungicide planning workshop (24 March 2020).

Thank you for participating in our bi-weekly meeting! Here's a slide set from my portion of the meeting (will open a pdf file). The spreadsheet examples I showed during my presentation can be accessed from the "Resources" tab on your right-hand side (or at the bottom, if you are accessing using a tablet or phone). ( or click here ) You can edit it after downloading it onto your device (file > Download >, please see the picture below) ( and then you may upload it to Google, if you choose to do so).

Thank you for joining our virtual vineyard meeting today. Let's hope that we won't see a bad frost event over this weekend... Please find the link below for my portion of the presentation.  Nita - Early season disease management As Tony mentioned at the meeting, if you have any questions, please send me an email, which is the best way to contact me right now.