| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit; Some fungal pathogens have figured out how to “sneak” past other DMI’s (triazoles) by altering the shape of their binding pockets.Conventional DMIs are rigid & cannot bind as easily to the altered shape of these binding pockets.They fail to control the disease effectively. This shows up in the field as fungicide resistance. Cevya Fungicide from BASF molecular flexibility can overcome these changes in binding pockets, providing strong performance even on some fungicide-resistant or shifted strains. If you have a molecule, like Cevya fungicide that has this capability, you can use lower concentrations (i.e. lower EC50 values, higher intrinsic activity) If you have a molecule that has a poorer fit, you need to overload the system to have the same impact. This new fungicide from BASF appears to provide a long residual efficacy, excellent performance and a favorable environmental profile to give growers the flexibility they need to combat the pathogen resistance:09/23
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| Reasons for need: |
Alternaria leaf spot (ALS); ALS is a fungal disease that affects all cultivated cabbage & brassicas, causing small black spots that grow into large lesions with characteristic concentric rings on leaves, stems and heads. The disease is of growing concern to growers nationwide particularly in the SW US/Coastal CA because of decreasing efficacy of narrow number of fungicides available to control the disease. Due to the limited available chemistries the risk of pathogen resistance to the limited modes of action is larg:09/23
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| Requesting State(s): |
AZ:Hu, J* ;
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| PCR Use Pattern: |
Use Cevya; 5 fl. oz/A; Foliar application; Max 3 alternaterd applications/year; RTI: 7 days; PHI: days
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| EPA Default Residue Trials: |
1-2 2 3 5 6 8 10
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| IR-4 Residue Trial Plan: |
1, 2, 3, 5, 6, 10 (Decline); NAFTA 1-2, 2-2, 5-2, 10-2
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| Residue Protocol Use Pattern: |
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| Efficacy/Crop Safety (E/CS) Data Required: |
BASF requires both E and CS data from at least 3-4 trials in California to generate the required data to secure registration with CA-DPR:09/23
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| Comments: |
Mfg supports as Researchable, Residue & E/CS Data Needed, and BASF suggests that the GAP be finetuned so excessive residues are avoided on the harvested commodity which may not pass JMPR/Codex review. BASF suggests adding additional decline sampling points for the RAC in the MOR trials to evaluate residue data from multiple PHI. This approach would be similar to the residue program for broccoli in 2024 (PCR # 13741). And similar to the ongoing projects in hops (PR #13505) and broccoli, BASF offers to conduct the analytical phase of the residue program.:09/23
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