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. Application 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!!