| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit; As a new and quarantine pest in CA tomato production there are very limited options for control and management of these parasitic weeds. We have one registered material for use (through a 24(c) for rimsulfuron) and are concerned about development of quick resistance because of the significant use in the impacted region (~20,000 acres currently with significant preventative use). This material, as trialed for multiple years by the Hanson lab, would provide another tool that is effective and stave off resistance. These trials have shown efficacy and crop safety. We are looking for help here in the collection of data for residues; VGF-WSR:08/24;
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| Reasons for need: |
Branched broomrape (Phelipanche ramosa), Egyptian broomrape (Phelipanche aegyptiaca).As a new and quarantine pest in CA tomato production there are very limited options for control and management of these parasitic weeds. We have one registered material for use (through a 24(c)) and are concerned about development of quick resistance because of the significant use in the impacted region (~20,000 acres currently with significant preventative use). This material, as trialed for multiple years by the Hanson lab, would provide another tool that is effective and stave off resistance:07/24; CA: Residue is needed for export market MRLs:09/25;
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| Requesting State(s): |
CA:Hanson, B*, Bagley, Z ;
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| PCR Use Pattern: |
Make 5 foliar applications of Sprout-Stop per season. The first two applications will be at 13.7 fl oz/a and will be applied at 100 and 200 Growing Degree Days (GDD) after planting tomatoes. The remaining three applications will be at 27.4 fl oz/a and made at 400, 700 and 1,000 GDD. Applications should not be made within 30 days of harvest.
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| EPA Default Residue Trials: |
1 2 3-2 5 10-11
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| IR-4 Residue Trial Plan: |
1 2 3-2 5 10-11, 2 decline, 1 processing
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| Residue Protocol Use Pattern: |
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| Efficacy/Crop Safety (E/CS) Data Required: |
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| E/CS Research Comments: |
IN THE 2025 PERFORMANCE PROTOCOL: TESTING SPROUT STOP PRODUCT FOR CONTROL OF BRANCHED BROOMRAPE; TEST VARIOUS TREATMENT SCENARIOS OF 21, 28 AND 32 FL OZ PRODUCT/A, APPLIED FOLIAR BROADCAST 6 TIMES, IN AT LEAST 30 GPA, COMPARED WITH SUBSURFACE CHEMIGATION RIMSULFURON AND STANDARD HERBICIDE PROGRAM TREATMENTS; SEE PROTOCOL FOR DETAILED APPLIC AND TREATMENT REQUIREMENTS; EVALUATE CROP INJURY, BROOMRAPE EMERGENCE AND CROP YIELD
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| Label Use Pattern Submitted To EPA: |
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| EPA PIF Status: |
Orange:02/26;
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| EPA Status: |
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| EPA PRIA Date: |
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| MRID: |
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| Comments: |
Key Export Markets: Canada, Mexico, Britain, EU, Japan; requester is specifically pursuing processing tomatoes for CA. The submitted supporting data states that maleic hydrazide did not injure tomatoes. 2023 data showed average number of emerged broomrape custers was reduced over 80% by MH and Brad told me that his 2024 MH treatments looked fantastic until just recently:08/24/sb; Drexel Chem supports as Potential: E/CS Data Before Approval for Residue Study, with proposed use needing to be fine-tuned, if nominated:09/24/sb; Status changed from Potential to ECS data ongoing 04/25/ds; during the 2025 FUW, Drexel advised they will now support as Researchable, Only Residue Data Needed:09/25/sb; Commodity of Tomato (Field) updated to Tomato:12/25/sb; although advised Residue only at workshop, Drexel is also looking for 2026 E/CS based on higher rates:12/25/sb; status updated from Researchable, Only Res Data Needed to Researchable, E/CS ongong; Residue Data Needed, since E/CS protocol signed (to update again once residue protocol is signed):12/25/sb; Status updated to "RESIDUE ON-GOING; E/CS DATA ON-GOING" 01/26/ds; EPA (HOLD) Caution:02/26/sb;
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| International Status: |
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| Archive Location: |
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| QA Archive: |
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