Seed & seeding

Protect your vineyard early

29 janv 2024

grape vineyard​​​​​​​

Editor's note: This article was originally published in 2024 and was updated in October 2025.

Gone are the days of early-season disease management in grapes. With the reduction in multi-site chemistry use, Phomopsis, anthracnose, black rot, and downy mildew have become increasingly more present in vineyards located in cool, moist environments. To change it up when implementing your early-season fungicide program this year, consider Allegro®,  Aprovia®, and Captan L.


Allegro logo

In 2022, Allegro fungicide was registered as a tool for early season control of dead arm (Phomopsis) and suppression of anthracnose.

Allegro specializes in hard-to-control diseases and offers important features and benefits, including:

  • Low risk for resistance as a Group 29 chemistry
  • Contact activity, like many fungicides historically used for early season disease management, but with the added ability to stop spore germination
  • The flexibility to maximize use of Group 3, 7, and 11 fungicides for Botrytis and powdery mildew

Apply Allegro at 1.0-1.2 L/ha, depending on the target disease. Tank mixing with sulphur has not been tested in Canada. Read more on the label.

Hear Ontario Horticulture Specialist Eric Phillips talk about why growers consider Allegro as part of their program.

When Allegro is paired with a powdery mildew product such as Aprovia® fungicide, you can be confident your vineyard is protected from early season diseases. But what then? Captan L fungicide is a great rotation partner covering off downy mildew, black rot and dead arm (Phomopsis).



Aprovia logo

Aprovia® contains Solatenol® technology and is your pre-bloom fungicide for powdery mildew. Aprovia® spreads by translaminar movement within the leaf for long-lasting protection from the inside out. 

Aprovia® can be applied at 0.5-0.75 L/ha, using the higher rate when conditions are more conducive to disease. Read more on the label.

As an alternative to Aprovia®, Solatenol® technology is also available in Aprovia® Top fungicide, a pre-mix with the proven partner difenoconazole. Apply Aprovia® Top at 0.643 L/ha.


Aprovia® beginning at pre-bloom provides 98% control of powdery mildew symptoms on clusters

Aprovia provides 98% control of powdery mildew symptoms
Source: External data, PA (PMDR 10:SMF024 2015). Three applications were made at immediate pre-bloom, immediate post-bloom, and buckshot-size berries.


​​​​​​​Looking for more information on early season grape protection? Reach out to your local retail partner or find your local Syngenta hort specialist.

Performance evaluations are based on internal trials, field observations and/or public information. Data from multiple locations and years should be consulted whenever possible. Individual results may vary depending on local growing, soil, and weather conditions.

Always read and follow label directions. Allegro®, Aprovia®, Solatenol® and the Syngenta logo are trademarks of a Syngenta Group Company. Allegro® is a trademark of ISK Biosciences.