Almonds – Blossom Blight, Brown Rot

Crop(s):          Almonds

Pest(s):           Blossom Blight and Brown Rot

Resistance Management Strategy for:

Group 2           (Dicarboximide) fungicides;

Group 3           (DMI);

Group 7           SDHI (Succinate dehydrogenase inhibitors)

Group 11         (Quinone outside inhibitor) fungicides

1. DO NOT apply consecutive sprays of products containing Group 11.

2. DO NOT apply more than three Group 3, Group 7 or Group 11 sprays per season (this includes mixture of Group 3 + 11 and Group 7 + 11).

3. DO NOT apply more than two Group 2 sprays in one season. Apply no more than two consecutive sprays before changing to another group.

4. If applying Group 7 fungicides, DO NOT apply more than two consecutive sprays before changing to another group. DO NOT apply more than three Group 7 sprays per season. If consecutive sprays are used, then use the same number of sprays of an alternative group before using another Group 7, including sprays in consecutive seasons.

5. Consecutive application include from the end of one season to the start of the following season.

6. Alternate with products from Groups M2, M3 and M4.

7. The spray program should be considered and the strategy applied on a whole-orchard basis.

Content last updated: June 28, 2017

CropLife Australia’s Resistance Management Strategies provide a guide for crop protection product rotation through product groups. The strategies are a useful tool that supports farmers’ adoption of resistance management.

All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits. These Resistance Management Strategies do not replace product labels. They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance. It is important to check with the Australian regulator’s (APVMA) product database for contemporary information on products and active constituents. The database can be sourced through