Broccoli and Cauliflower – Downy mildew

Crop(s):          Broccoli and Cauliflower

Disease(s):     Downy mildew

Resistance Management Strategy for:

Group 4      Phenylamides (PA);
Group 11    Quinone outside inhibitor (QoI);
Group 21    Quinone inside inhibitors (QiI);
Group 28+43    Carbamate + benzamide; and
Group 49    Oxysterol binding protein inhibitors (OSBPI).

1. Applications made within the nursery count towards the total number of applications allowed per crop. It is recommended that disease control is started early and maintain a regular program using a fungicide from groups other than Group 4, 11, 21, 28+43 or 49.
2. When conditions favour disease development, do not wait for disease to appear, but apply two consecutive sprays of a Group 4, 11, 21, 28+43 or 49 product at the interval recommended on the label. Then resume the program of sprays using products from a different group to the products just applied.
3. Do not apply more than three sprays of a Group 4, 11, 21, 28+43 or 49 product or 33% of the total number of fungicide sprays per season, whichever is more restrictive.
4. Apply Group 4 and 49 fungicides preventatively and only in mixtures with effective protectant fungicides from a different group.
5. Do not use a Group 49 product if it will be the last fungicide applied to the crop.
6. Continue alternation of fungicides between successive crops. Do not make more than (6) six total applications of a Group 49 product per year on the same area targeting the same disease.

* Maximum application number on product label may differ. Ensure you follow the label recommendations.
^ Not allowed in nursery production