Wheat – Yellow spot

Crop(s):          Wheat

Disease(s):     Yellow spot, powdery mildew

Resistance management strategy for:

Guidelines:

1. Fungicides should be used as protectant treatments prior to symptoms of disease when conditions are conducive to disease development.
2. In high-risk disease environments, integrated management approaches should be used to reduce fungicide resistance risk, which may include:
   1. removal or burning of stubble,
   2. crop rotation (avoid wheat on wheat),
   3. control of green bridge volunteers; and
   4. use of tolerant and resistant varieties.
3. Do not apply more than two applications per growing season of Group 11, or 7 containing products. This includes in-furrow or seed treatments that have activity on foliar diseases. Combinations of in-furrow and seed treatment are counted as one application.
4. Do not apply consecutive applications of Group 11 containing products. This includes in-furrow i.e. If a Group 11+4 fungicide has been used in-furrow at planting, the first foliar fungicide spray must not contain a Group 11
5. If a Group 7 seed treatment has been used with foliar activity (as determined by label claims), the first foliar fungicide applied should not contain a Group 7
6. Do not apply more than one application of a Group 7 seed treatment with foliar activity in any two consecutive growing seasons.
7. If a Group 7 or 11 fungicide is being applied as a foliar spray, it must be in a co-formulation or in mixture with a registered mixing partner with a different mode of action, with no known resistance. The mixture partner should also provide effective disease control when used alone on the target disease.
8. Do not apply more than three applications containing Group 3 fungicides per growing season. This total of three applications includes DMIs applied as Group 11+3 or Group 11+7+3 co-formulations and in-furrow or seed treatments that have activity on foliar diseases. Combinations of in furrow and seed treatment are counted as one application.
9. Minimise use of Group 3 fungicides which are known to have compromised resistance status.
10. Do not apply Group 13 fungicides onto existing infections of powdery mildew. Always use preventatively. If applying consecutive applications, use an effective mixing partner.
11. Reduced rates, including multiple applications must not be used. Always use label rates.