Pests

Protecting highbush blueberries against Botrytis?

May 18, 2022

When wet weather coincides with the approach of bloom, it’s important to protect those flowers against the primary source of infection.

Miravis® Prime fungicide brings dual modes of action for Botrytis in highbush blueberries (Crop Subgroup 13 07B), strawberries (Crop Subgroup 13 07G, excluding lowbush blueberries) and grapes.

Miravis® Prime should be applied at early bloom at a rate of 0.32 to 0.4 L/acre.

What about Switch®?

Switch 62.5WG fungicide is the global standard for Botrytis control in fruit crops. It also provides broad-spectrum protection, bringing additional control against key fruit rot pathogens like anthracnose.

Switch should be applied at early bloom at a rate of 0.31 to 0.39 g/acre.

What about resistance management?

Follow these seven steps to help manage fungicide resistance.

  1. Participate in resistance monitoring.
  2. Keep the applications from each FRAC group to a minimum.
  3. Alternate high-risk fungicides.
  4. Know your groups — find the FRAC Group on the product label.
  5. Mix it up — include low-risk fungicides in the tank.
  6. Use alternative disease control methods (improve air flow, manage your irrigation schedule, etc.).
  7. Only apply fungicides when needed.

Fludioxonil, an active ingredient at low to medium resistance risk, is in both Miravis® Prime and Switch. Manage Botrytis sustainably and use fungicides that contain fludioxonil only twice in a season to reduce the risk of developing resistance.

At time of publication, Maximum Residue Limits (MRLs) for the active ingredient pydiflumetofen (ADEPIDYN®) are not harmonized for all export countries. Please see the Bryant Christie Inc. Global MRL database for a complete list of MRLs. Please check with your exporter when using Miravis® Prime. Do not make more than two applications of any ADEPIDYN® containing product (e.g. Miravis® Neo or Miravis® Prime) on blueberries per year.

These are general considerations. Always consider the specific situation on your field and exercise good agronomic practices.

Always read and follow label directions. Miravis® Neo refers to Miravis® Neo 300SE fungicide. Miravis®, Switch® and the Syngenta logo are trademarks of a Syngenta Group Company.