Slow resistance down with Allegro
1 fév 2024
Recent label expansions to Allegro® fungicide have opened the door for more Canadian horticulture growers to experience its flexibility and convenience.
In 2023, the Allegro label expanded again to include an even wider range of diseases, including a new mode of action to combat Botrytis in wine grapes and blueberries, and Stemphylium in bulb onions.
Blueberry growers will also note a new rate range for anthracnose and mummyberry, allowing more flexibility when applying Allegro.
With its low risk of fungicide resistance, Allegro (Group 29) can be used as a rotational partner with other products such as Switch® (Group 9 + 12) and Miravis® Prime (Group 7 + 12) in wine grapes, Switch in blueberries, and Aprovia® (Group 7) and Miravis® Duo (Group 3 + 7) in bulb onions.
The expanded label now includes the following diseases for the crops listed below:
| Crop | Disease | Rate L/ac | Maximum applications |
|---|
| Grapes (except table grapes) | Botrytis
Dead arm
Anthracnose* | 0.40 (1.0 L/ha) to 0.48 (1.2 L/ha) | 2 |
| Blueberries (highbush and lowbush) | Botrytis Phomopsis fruit rot*
Fruit anthracnose*
Mummyberry* | 0.59 - 0.91** | 2 |
| Blueberries (lowbush) | Valdensinia leaf spot* | 0.16 - 0.32 | 4 |
| Bulb onions | Stemphylium leaf blight*
Botrytis leaf blight*
Purple blotch* | 0.47 | 5 |
*Suppression only
**Rate dependent on target disease
Learn more about why growers are excited for this Botrytis registration in this YouTube video. Please read and follow label directions.
Allegro reduces Stemphylium leaf blight in bulb onions
Onion foliage treated with Allegro had 47% foliar blight compared to 86% in the untreated control. N = 2
Source: External data (PDMR 13:V135 MI 2018, PDMR 14:V165 MI 2019). Disease severity (% leaf blight) after six or eight applications is shown, with applications made one a 7 to 10-day interval beginning in late June or early July each year. Trials conducted using Allegro® formulation branded as Omega® in the United States.
Curious on how to include Allegro in your crop protection program? Reach out to your local Syngenta Representative or retail partner for more information.
Lowbush blueberry growers: interested in trying Allegro? Before applying check in with your packer or reach out to your local Syngenta horticulture specialist.
For more information including articles, resources and videos on resistance management, check out Manage Resistance Now. This is a collaborative effort of industry, academia and government experts, brought together by CropLife Canada, to raise awareness and promote the adoption of strategies to manage weed, insect and disease resistance.
Performance evaluations are based on field observations and 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. Aprovia®, Miravis®, Switch® and the Syngenta logo are trademarks of a Syngenta Group Company. Allegro® is a trademark of ISK Biosciences Corporation.
