Crop(s): Lettuce
Disease(s): Botrytis and Sclerotinia
Resistance Management Strategy for:
Group 2 Dicarboximides;
Group 7 Succinate dehydrogenase inhibitors (SDHI);
Group 7+11 SDHI + Quinone outside inhibitors (QoI);
Group 7+12 SDHI + phenylpyrroles (PP);
Group 9 Anilinopyrimidines (AP);
Group 11 Quinone outside inhibitors (QoI);
Group 9+12 AP + PP; and
Group 21 Picolinamide (Qil).
- Maintain a cover with protectant fungicide sprays at seven to ten day intervals from planting.
- Do not apply Group 2 fungicides more than four times per season, irrespective of the target disease.
- Do not apply more than two fungicides containing Group 9 per crop (including Group 9+12).
- Do not apply more than three Group 7, Group 11, or Group 21 containing fungicides per crop and no more than two consecutive sprays per crop. If a Group 7 or 11 fungicide has been used solo it should be in strict alternation with other modes of action. If used in a mixture, no more than two consecutive sprays per crop. This includes the treatment at the end of one crop and the start of the next as consecutive.
- Group 7 and Group 21 containing sprays should not make up more than one in every three of the spray program.
- Do not apply more than two consecutive applications of a Group 12 containing fungicide.
- Apply Group 21 as a protectant spray only. Continue alternation of fungicides between successive crops. Do not apply more than five (5) application of Group 21 per year on the same area.
- No specific resistance management strategy has been developed for low-risk fungicides, including those in Group M and BM. These products should be included in a management strategy as per label recommendations.
|
Maximum recommended number of sprays which can contain Group: |
Total number of targeting sprays |
|
2 |
7 (incl. 7+11) |
9 (Incl. 9+12) |
11 (Incl. 7+11) |
12 (Incl. 7+12) |
21 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
2 |
1 |
1 |
1 |
1 |
2 |
1 |
3 |
1 |
1 |
1 |
1 |
2 |
1 |
4 |
2 |
1 |
2 |
2 |
2 |
1 |
5 |
2 |
1 |
2 |
2 |
2 |
1 |
6 |
2 |
2 |
2 |
2 |
2 |
2 |