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Prnum Pesticide(MFG) Commodity (Crop Group) Category (Code) EPA Status 12572 A QUINCLORAC ADAMA,ALBAGH PEACH (12-12B = PEACH SUBGROUP) RESEARCHABLE, ONLY RESIDUE DATA NEEDED (03) Reasons for need: FIELD BINDWEED, HEDGEBINDWEED; CANADA THISTLE; BARNYARDGRASS; CRABGRASS; OTHER HERBICIDES ARE NOT AS EFFECTIVE AS QUINCLORAC FOR BINDWEED CONTROL Efficacy/Crop Safety (E/CS) Data Required: E/CS Research Comments: PERFORMANCE PROTOCOL FOR 2022 TRIALS ALSO COVERS THE NEEDS FOR PR# 12573/PLUM AND 12574/CHERRY TO COVER STONE FRUITS; EACH TRIAL WILL LAST TWO YEARS, WITH THE SAME TREATMENTS APPLIED TO THE SAME PLOTS EACH YEAR; TWO TRIALS WILL BE CONDUCTED ON EACH CROP (PEACH, PLUM, CHERRY); TESTING 2 RATES OF QUINSTAR 4L (0.375 AND 0.75 LB AI/A), IN AT LEAST 10 GPA, COMBINED WITH A CROP OIL CONCENTRATE (COC) AT 2 PT/A OR A METHYLATED SEED OIL (MSO) AT 1.5 PT/A; TREATMENTS WILL BE APPLIED AS DIRECTED SPRAYS TO BOTH SIDES AND ACROSS ROWS (SEE PROTOCOL FOR MORE DETAILED APPLIC REQUIREMENTS); EVALUATE CROP INJURY AND VIGOR, WEED CONTROL EFFICACY AND CROP YIELD; 2023 PERFORMANCE PROTOCOL CONTINUES TRIALS ON THE SAME PLOTS USED IN 2022 TRIALS Comments: JAPAN AND CHINA ARE KEY EXPORT MARKETS; BASF NO LONGER SUPPORTS THIS AI; ALBAUGH SUPPORTS, RESIDUE ONLY, BUT HAS NO PLAN TO REGISTER IN CA:08/18; EPA GREEN:09/19 & 08/20; MFG CHANGED TO POTENTIAL AT FUW (NEED MORE PERFORMANCE DATA BEFORE APPROVAL FOR RESIDUE WORK), AND CONFIRMED THEY WILL SUPPORT REGISTRATION/USE IN CA:09/20; CATEGORY CHANGED FROM POTENTIAL; E/CS DATA BEFORE APPROVAL FOR RESIDUE STUDY TO E/CS DATA ONGOING:12/21; STATUS UPDATED TO RESEARCHABLE, E/CS ON-GOING; RESIDUE DATA NEEDED:10/22; EPA GREEN: 08/23; The performance protocol covers additional PR#s: 12573 Quinclorac/Plum & 12574 Quinclorac/Cherry 05/24/drs; Albaugh status update from e/cs data ongoing to Researchable, Only Residue Data Needed:07/24/sb Field Res.Dir (FRD) Field ID# Field Data Track# Raw Data Data to MFG Performance Results & Comments Mitchem, Wayne 22-NCP02 RECD 5613.pdf 08/23 TRIAL ACTUALLY CONDUCTED IN SOUTH CAROLINA. REPORT INCLUDES PARTIAL 2023 DATA. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘CAROKING’ PEACHES GOWING IN A ‘CECIL’ SANDY CLAY LOAM. APPLICATIONS MADE 38 AND 24 DAYS PRIOR TO FIRST HARVEST. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION MADE IN LATE FALL. NO INJURY SEEN YEAR 1. AVERAGE FIRST HARVEST FRUIT YIELD FROM QUINSTAR RANGED FROM 105 TO 114% OF THE NONTREATED. Chaudhari, Dr. Sushila 22-MIP05 RECD 5327.pdf 11/22 QUINSTAR 4L APPLIED TWO OR THREE TIMES AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) ALONG BOTH SIDES OF ‘MONTMORENCY’ TART CHERRIES GROWING IN A LOAM SOIL. POST-DIRECTED APPLICATIONS MADE ALONG BOTH SIDES AND ACROSS LOWER TRUNKS OF TREES AT 43 AND 28 DAY BEFORE HARVEST (PHI) AND POST-HARVEST IN THE FALL. NOTE: ALL QUINCLORAC 15 DAY PHI TREATMENTS ACCIDENTALLY MADE AT TWICE PLANNED RATE. NO CROP INJURY SEEN FROM QUINCLORAC REGARDLESS OF RATE OR TIMING. GOOD BROADLEAF WEED CONTROL AT HARVEST. NO SIGNIFICANT DIFFERENCE IN YIELD BETWEEN TREATMENTS. LOW NUMERIC YIELD FROM ONE TRT ATTRITUBED TO OVERALL SMALLER TREES IN THAT TRT. Smith, Stephen C 22-NCP05 RECD 5539.pdf 1/23 QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘CAROLINA GOLD’ PEACHES GOWING IN A LOAMY SAND. APPLICATIONS MADE APPPROXIMATE 60 AND 45 DAYS PRIORO TO HARVEST. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION MADE IN LATE FALL. NEGLIGIBLE INJURY SEEN WHEN SUCKERS WERE PRESENT AND WERE CONTACTED BY SPRAY SOLUTION. FRUIT YIELD WAS NOT IMPACTED BY QUINCLORAC, REGARDLESS OF RATE OR TIMING. Brunharo, Caio (WA) 22-PAP02 RECD 5592.pdf 6/23 QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘MONTMORENCY’ CHERRIES GOWING IN AN ‘ARENDTSVILLE’ GRAVELLY LOAM. APPLICATIONS MADE 52 AND 32 DAYS PRIOR TO ANTICIPATED HARVEST. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION MADE IN LATE FALL. NO INJURY SEEN YEAR 1. NO WEED CONTROL DATA COLLECTED DUE TO LIGHT WEED PRESSURE. NO HARVES DATA COLLECTED DUE TO SEVERE BIRD PREDATION OF FRUIT. Mitchem, Wayne 23-NCP03 RECD 5726.pdf 04/24 YEAR 2 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS IN CONSECUTIVE YEARS. TRIAL ACTUALLY CONDUCTED IN SOUTH CAROLINA. REPORT INCLUDES DATA FROM BOTH YEARS. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘CAROKING’ PEACHES GOWING IN A ‘CECIL’ SANDY CLAY LOAM. IN-SEASON APPLICATIONS WERE 16 DAYS APART, BEGINNING IN MID-MAY. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION OF EACH RATE MADE IN LATE FALL. 2023 YIELD DATA NOT COLLECTED DUE TO LATE FROST EVENT IN SPRING. NO INJURY SEEN FROM ANY TREATMENT AND NO DIFFERENCES BETWEEN TREATMENTS OBSERVED IN SPRING 2024 VIGOR EVALUATION. Smith, Stephen C 23-NCP04 RECD 5727.pdf 04/24 YEAR 2 OF 2, WITH TREATMETNS APPLIED TO THE SAME PLOTS BOTH YEARS. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘CAROLINA GOLD’ PEACHES GOWING IN A LOAMY SAND. APPLICATIONS MADE APPPROXIMATE 60 AND 45 DAYS PRIORO TO HARVEST. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION MADE IN LATE FALL. NO CROP INJURY SEEN AT ANY OF THE 2023 EVALUATIONS. FRUIT YIELD WAS NOT IMPACTED BY QUINCLORAC, REGARDLESS OF RATE OR APPLICATION TIMINGS AND QUINCLORAC DID NOT IMPACT EARLY SEASON CROP VIGOR IN 2024. Hanson, Brad 22-CAP03 RECD 5728.pdf 05/24 YEAR 1 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS IN CONSECUTIVE YEARS. SEE COMMENTS FOR P12572.23-CAP19, YEAR 2 OF 2 FOR THIS PROJECT. Hanson, Brad 23-CAP19 RECD 5728.pdf 05/24 YEAR 2 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS IN CONSECUTIVE YEARS. TRIAL ACTUALLY BEGAN FALL OF 2021, SO SEVEN APPLICATION TIMINGS ARE INCLUDED. REPORT INCLUDES DATA FROM INITIAL TIMING THROUGH SPRING 2024 VIGOR EVALUATION. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF FENCH PRUNES GROWING IN A ‘RINCON’ SILTY CLAY LOAM. IN-SEASON APPLICATIONS WERE ~15 DAYS APART, BEGINNING IN LATE JUNE. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION OF EACH RATE MADE IN LATE FALL. NO INJURY OR YIELD REDUCTIONS SEEN FROM ANY TREATMENT AND NO DIFFERENCES BETWEEN TREATMENTS OBSERVED IN SPRING 2024 VIGOR EVALUATION. Hanson, Brad 22-CAP16 RECD 5729.pdf 05/24 YEAR 1 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS IN CONSECUTIVE YEARS. SEE COMMENTS FOR P12572.23-CAP20, YEAR 2 OF 2 FOR THIS PROJECT. Hanson, Brad 23-CAP20 RECD 5729.pdf 05/24 YEAR 2 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS IN CONSECUTIVE YEARS. REPORT INCLUDES DATA FROM BOTH YEARS. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘SANTA ROSA’ PLUMS GROWING IN A ‘MYERS’ CLAY. IN-SEASON APPLICATIONS WERE ~15 DAYS APART, BEGINNING IN MID-MAY. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION OF EACH RATE MADE IN LATE FALL. NO INJURY OR YIELD REDUCTIONS SEEN FROM ANY TREATMENT AND NO DIFFERENCES BETWEEN TREATMENTS OBSERVED IN SPRING 2024 VIGOR EVALUATION. Chaudhari, Dr. Sushila 23-MIP09 RECD 5755.pdf 05/24 YEAR 2 OF 2, WITH TREATMENTS APPLIED TO THE SAME PLOTS BOTH YEARS. QUINSTAR 4L APPLIED TWO OR THREE TIMES AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) ALONG BOTH SIDES OF ‘MONTMORENCY’ TART CHERRIES GROWING IN A LOAM SOIL. APPLICATIONS MADE ALONG BOTH SIDES AND ACROSS LOWER TRUNKS OF TREES AT 49 AND 42 DAY BEFORE HARVEST (PHI) AND POST-HARVEST IN THE FALL. NOTE: SECOND APPLICATION OF EACH TREATMENT ACCIDENTALLY MADE 7 DAYS AFTER FIRST, INSTEAD OF 15 DAYS LISTED IN PROTOCOL. NO CROP INJURY SEEN FROM QUINCLORAC REGARDLESS OF RATE OR TIMING. GOOD TO EXCELLENT GRASS CONTROL FROM ALL QUINCLORAC TREATMENTS; BROADLEAF WEED CONTROL VARIABLE. NO SIGNIFICANT DIFFERENCE IN YIELD BETWEEN QUINCLORAC TREATMENTS AND WEED-FREE. CROP VIGOR IN SPRING 2024 NOT IMPACTED BY QUINCLORAC TREATMENTS. Brunharo, Caio (WA) 23-PAP03 RECD 5787.pdf 07/24 YEAR 2 OF 2 WITH TREATMENTS APPLIED TO THE SAME PLOTS BOTH YEARS. QUINSTAR 4L POST-DIRECTED TWICE AT 12.6 OR 25.2 FL OZ/A (0.375 OR 0.75 LB AI/A) TO ORCHARD FLOOR AND ACROSS LOWER TRUNKS OF ‘MONTMORENCY’ CHERRIES GOWING IN AN ‘ARENDTSVILLE’ GRAVELLY LOAM. APPLICATIONS MADE 38 AND 25 DAYS PRIOR TO HARVEST. ADDITIONAL TREATMENTS INCLUDED A THIRD APPLICATION MADE IN LATE FALL. NO INJURY SEEN IN YEAR 2, REGARDLESS OF APPLICATION RATE OR TIMING. NO WEED CONTROL DATA COLLECTED DUE TO LIGHT WEED PRESSURE. QUINCLORAC DID NOT IMPACT CHERRY YIELD. CHERRY VIGOR EVALUATION IN SPRING 2024 SHOWED NO IMPACT FROM QUINCLORAC TREATMENTS. Performance Summary 24-HQ-SUM RECD 5802.pdf 07/24 SUMMARY OF IR-4 PRODUCT PERFORMANCE PREPARED BY RBB. INCLUDES DATA FROM FT ID#s 22-MIP05, 22-NCP02, 22-CAP03, 22-CAP16, 22-NCP05, 22-PAP02, 23-NCP03, 23-NCP04, 23-CAP19, 23-CAP20, 23-MIP09, 23-PAP03. FORWARDED TO ALBAUGH:07/24