Crop(s): Onion
Disease(s): Downy mildew
Resistance management strategy for:
Group 4 |
Phenylamides (PA); |
Group 28+43 |
Carbamates + benzamides |
Group 40 |
Carboxylic acid amides (CAA |
Group 45+40 |
Quinone outside inhibitors, stigmatellin binding type (QoSI) + CAA |
Group 49 |
Oxysterol binding protein inhibitors (OSBPI); and |
Group 49+11 |
OSBPI + quinone outside inhibitors (QoI). |
Guidelines:
- Start disease control early and maintain a regular program using a fungicide from groups other than Group 4, 40, 45+40 or 49 (or 49+11).
- When conditions favour disease development, do not wait for disease to appear, but apply two consecutive sprays of a Group 4, 28+43, 40, 49 (or 49+11) product at the interval recommended on the label. Then resume the program of sprays using products from a different mode of action group to the Group 4, 28+43, 40, 49 or 49+11 products just applied.
- Do not apply more than four sprays of a Group 4 or 40 product per season.
- Do not apply more than three sprays of a Group 28+43 or 49 (or 49+11) product per crop. Group 49 (or 49+11) containing sprays should not consist of more than one in every three of the total number of fungicide sprays per crop.
- Do not apply more than two sprays of a Group 45+40 product per crop.
- Apply Group 4, 40, 45+40 and 49 (including 49+11) fungicides preventatively.
- Apply Group 4 and 49 (or 49+11) fungicides only in mixtures with a registered fungicide from a different mode of action group, with no known resistance.
- Continue alternation of fungicides between successive crops. Do not make more than (6) six total applications of a Group 49 (or 49+11) product on multiple crops per year on the same area targeting the same disease.
|
Group |
4 |
28+43 |
40, 45+40 |
49, 49+11 |
Maximum number of consecutive applications |
2 |
2 |
2 |
2 |
Maximum number of solo sprays |
None |
|
|
None of 49 |
Maximum number of sprays per crop or season * |
4 |
3
(or 1 in 3) |
2 or 4 |
3
(or 1 in 3)
6 per year |
* Maximum application number on product label may differ. Ensure you follow the label recommendations