Skip to main content

Luna Tranquility supplemental label for wine grape

There is a supplemental label for the use of Luna Tranquility with wine grape (you can click this link to download.  It will open Google Doc, but you can download via clicking print icon on Google Drive).  Luna Tranquility is a sister fungicide to Luna Experience.  It has a fluopyram (FRAC group 7 = SDHI, medium risk) mixed with a pyrimethanil (FRAC group 9, the same as Scala).  As a product, it has an efficacy against powdery mildew and Botrytis. žApplication rate is 16-24 fl oz/A, and the maximum usage allowed is 54.7 fl oz/A per season; however, as usual, we recommend not to use it more than twice a season for management of fungicide resistance.  PHI is 7 days, which is shorter than that of Luna Experience (14-days).  It has a 12-h REI, but it does not have the 5-day cane work restriction as Luna Experience has.   We have tested in Winchester in 2013 season, and both Luna Experience (FRAC groups 7 + 3) and Tranquility provided excellent control against Botrytis.  

My only concern, which is not only for Luna Tranquility, but for all the new mixed materials, is that you need to think carefully about your rotation partners.  We often recommend three critical time applications for Botrytis, at bloom, bunch closure, and veraison.  If you have decided to use Luna Tranquility on two of these timings, I would recommend to use another mode of action to cover one of these timings.  (Hint: you cannot use Scala or Vangard, since both are in FRAC group 9.)  In addition, you need to think about rotation for other target pathogens, especially powdery mildew.  For example, a rotation with Pristine and Luna won't be a rotation because both contain FRAC group 7 material.  

As you can imagine, a planning of fungicide alone can get complicated very quickly.  Please make sure to spend time before the season starts to have at least a rough plan for disease management!  For a kick start of the season, we offer four IPM workshops this winter.  Please see the previous post for locations and time.

See you at the VVA meeting!! 


Popular posts from this blog

2021 Pest Management Guides for grapes (UPDATED 24 March 2021)

Updated: Links below are for the 2021 edition of Pest Management Guides. The first one is for home gardens, and the second is for commercial productions. I asked them to provide by chapter (= crop) and they made changes. :) 1) Visit the page by clicking one of the links below. (It is rather a slow page. Please be patient.) 2) Scroll down until you see "Links to individual chapters." Grapes are chapter 3 for both Home (Home Fruits) and Commercial Crops (Grapes) 3) Once you get to the site, click "PDF", then "Preview", and it will open a new window.  4) Scroll down a bit, and click "Download Version" to download the file to your computer.  2021 Home Grounds  Pest   Management   Guide 2021 Horticulture and Forest  Pest   Management   Guide

Late-season grape disease management tips.

Recent rains and more rains in the forecast made me think of downy mildew. Let's take a look at what the NEWA DMCast model says about downy mildew risks from the past two weeks. Westfield, NC (South of Stuart, VA) There were six DM risk events, including one that happened today.  (Note: we have a new weather station in Bristol. You can check the weather data, but the DMCast model is not working yet. I notified the NEWA about the lack of DMCast outputs.) Floyd, VA There were four days with downy mildew risk event(s) since the beginning of the month. Red Hill There were four days with downy mildew risk event(s) since the beginning of the month. Washington, VA There were nine days with downy mildew risk event(s) since the beginning of the month. Winchester, VA There were five days with downy mildew risk event(s) since the beginning of the month. It looks like there were more downy mildew risk events as we move northwards. Also, recent warm and humid nights can promote the downy mildew