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Prnum Pesticide(MFG) Commodity (Crop Group) Category (Code) EPA Status 11611 + QUINCLORAC ADAMA,ALBAGH STRAWBERRY (13-07G = LOW GROWING BERRY SUBGROUP) E/CS DATA ON-GOING (03G) Reasons for need: WEED CONTROL IN BETWEEN PLASTIC CULTURE ROWS; TO BE USED ALONG WITH SEEDING OF ANNUAL GRASS COVER CROP TO ELIMINATE ANNUAL WEEDS FROM SEED; ALSO FOR USE AS POSTEMERGENCE WEED CONTROL IN THE SAME SITUATION; NEEDED TO CONTROL FIELD BINDWEED IN BEARING PERENNIAL STRAWBERRY:01/17 Efficacy/Crop Safety (E/CS) Data Required: E/CS Research Comments: IN THE 2023 PERFORMANCE PROTOCOL: TESTING 2 RATES OF QUINSTAR 4L (0.375 AND 0.75 LB AI/A), APPLIED 3 TIMES OVER 2 YEARS WITH A HOODED/SHIELDED SPRAYER, AS BANDED APPLIC TO THE SOIL ON BOTH SIDES OF STRAWBERRY BEDS, IN AT LEAST 15 GPA, COMBINED WITH A QUINSTAR LABEL RECOMMENDED ADJUVANT; 1ST APPLIC OF TRMTS WILL BE IN THE ESTABLISHMENT YEAR 2023, ABOUT 5-6 WEEKS AFTER PLANTING; 2ND AND 3RD APPLIC WILL BE IN 2024, WITH FINAL (3RD) APPLIC AFTER FINAL BERRY HARVEST IN 2024 (SEE PROTOCOL FOR MORE DETAILED APPLIC REQUIREMENTS); EVALUATE CROP INJURY AND VIGOR, WEED CONTROL EFFICACY AND CROP YIELD; PER THE 2024 PROTOCOL, TEST THE SAME RATES, GPA, # OF APPLIC, INTERVAL, BUT SEE PROTOCOL FOR SOME APPLIC TIMING AND METHOD CHANGES FROM EARLIER YEAR TESTING Comments: TOLERANCE IS ESTABLISHED ON LOW GROWING BERRY, EXCEPT STRAWBERRY, CROP SUBGROUP 13-07H, AND QUINSTAR 4L SUPPLEMENTAL LABEL PROHIBITS USE ON STRAWBERRY:11/14; AT 2015 FUW, ADAMA CONFIRMED THEY WILL NOT SUPPORT THIS REQUEST; NEED TO CHECK WITH OTHER MFG:09/15; EPA GREEN:09/18 & 09/19; ADAMA WILL SUPPORT IF ALBAUGH DOESN'T:05/20; EPA GREEN: 08/20, 08/21, 08/23 Field Res.Dir (FRD) Field ID# Field Data Track# Raw Data Data to MFG Performance Results & Comments Moretti, Marcelo 24-ORP01 Peachey, Ed 17-OR-DMP RECD 4562.pdf 8.4 FL OZ/A APPLIED 1 DAY POST-TP TO PERENNIAL STRAWBERRY; EXCELLENT CROP SAFETY; EQUAL TO THE STANDARD PENDIMETHALIN. Zandstra, Dr. Bernard H. 18-MI-DMP RECD 4666.pdf 0.25 LB AI/A + COC POST DIRECTED; GOOD CROP TOLERANCE. Cutulle, Matthew 24-SCP01 RECD 5673.pdf 06/24 Two applications of Quinstar 4L at 12.6 or 25.2 fl oz/a (0.375 or 0.75 lb ai/a) applied as hooded/shielded spray between plastic mulch beds of ‘Camarosa’ strawberry growing in a sandy loam soil. Initial application 21 days after transplanting. Second application made 17 days before first berry harvest. No crop injury observed, regardless of application timing or rate. Quinclorac treatments did not have any effect of strawberry yield. Vinson, Edgar 24-ALP01 RECD 5857.pdf 11/24 Two applications of Quinstar 4L at 12.6 or 25.2 fl oz/a (0.375 or 0.75 lb ai/a) applied as hooded/shielded spray between plastic mulch beds of ‘Camarosa’ strawberries. Applications were made 17 and 49 days after transplanting. Strawberry plant size from quinclorac treatments were not different from the control approximately 3 weeks after first harvest, but both rates were numerically lower than the control. The high rate significantly reduced biomass of ryegrass cover crop in between beds 11 days prior to first harvest. No crop injury observed, regardless of application timing or rate. Quinclorac treatments did not have any effect of strawberry yield. Sosnoskie, Lynn 23-NYP05 RECD 5916.pdf 04/25 Trial initiated in 2023 on matted row strawberries and was planned for applications over two years, with harvest data collected in year 2. Only 2023 data reported, due to damage from wildlife. Two applications of Quinstar 4L at 6.3, 12.6, 25.2 or 50.5 fl oz/a (0.1875, 0.375, 0.75 or 1.5 lb ai/a) applied with a single, shielded nozzle between rows of ‘Jewel’ strawberries growing in a Honeoye loam. Applications were made 66 and 94 days after transplanting, though a second application in year 1 was not required in the protocol. Some crop stunting and foliar injury was observed after both application timings, likely due to strawberry runners rooting into treated soil as they grew larger. The two lower rates were generally safe, while injury from the two higher rates was significantly different from the weed-free in several instances. Damage from deer grazing and trampling in the crop prevented applications and yield data collection in year 2. In a separate greenhouse experiment, quinclorac applied postemergence broadcast over ‘Jewel’ strawberries did not cause as much injury as seen in the field trial.