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PrnumPesticide(MFG)Commodity (Crop Group)Category (Code)EPA Status
13134
B
2,4-D
DOWAGR,LOVLND,NUFARM
POTATO (01C = TUBEROUS AND CORM VEGETABLES SUBGROUP) UNDER EVALUATION (06)
Reasons for need: BROAD-LEAF WEEDS; THERE ARE NOT ANY GOOD CONTROL OPTIONS FOR LARGE-SEEDED BROAD LEAF WEEDS, ESPECIALLY POSTEMERGENCE; THE ONLY PRODUCT ALLOWED FOR POSTEMERGENCE WEED CONTROL IN WHITE (CHIPPING POTATOES) IS RIMSULFURON; SOIL CARRYOVER OF RIMSULFURON PREVENTS SOME CROP FROM BEING PLANTED THE NEXT YEAR; 2,4-D USE IN FRESH POTATOES HAS BEEN SHOWN TO SUPPRESS WEED AND NOT LIMIT YIELD OR CAUSE CARRYOVER; THERE IS NO DATA ON RESIDUES OF 2,4-D AFTER THE CHIP FRYING PROCESS; PER MN ME-TOO REQUEST: THE NORTHERN PLAINS POTATO GROWERS ASSOC. STRONGLY SUPPORTS THIS PROJECT REQUEST
Efficacy/Crop Safety (E/CS) Data Required:
E/CS Research Comments:
Comments: KEY EXPORT MARKETS NOTED INCLUDE CANADA AND ASIA PACIFIC RIM COUNTRIES; THE WEEDONE LV4 LABEL ALLOWS FOR POST USE IN RED SKIN VARIETIES (FOR SKIN COLOR ENHANCEMENT, SUPPORTED BY IR-4 RESIDUE WORK [PR# 04302], AND REGISTERED IN 2012); THIS REQUEST IS ASKING FOR A USE IN POTATOES OTHER THAN RED SKIN VARIETIES AND IS ASKING FOR THE USE TO BE LISTED FOR WEED CONTROL; IR-4 ALSO CONDUCTED A RESIDUE STUDY FOR A 2,4-D REQUEST AS A WEED CONTROL AGENT, PR# 01029; THE USE PATTERN IN THAT STUDY (FINAL REPORT SIGNED IN 2004) COVERS THE PATTERN IN THIS NEW REQUEST, ALONG WITH A PREPLANT BURNDOWN APPLIC; THAT STUDY ALSO INCLUDED DATA ON PROCESSED FRACTIONS (FLAKES, WET PEELS AND FRIED CHIPS) AND IS INDICATED AS REGISTERED:07/20; THIS REQUEST LIKELY REQUIRES ONLY A LABEL AMENDMENT, WHICH IS A MFG ACTION:08/20; CANADA HAS INTEREST IN THIS REQUESTED USE, AND MAY HAVE SOME USEFUL DATA:10/20; CORTEVA WILL NOT SUPPORT THIS USE:07/21; EPA CAUTION: 08/21;
Field Res.Dir (FRD)Field ID#Field DataTrack#Data to MFGPerformance Results & Comments
Robinson, Andrew P 16-ND-DMP RECD 4970.pdf TWO TRIALS IN 2015 – 2016 WITH 2 FORMULATIONS ON 6 VARIETIES IN DRYLAND AND IRRIGATED CROPPING SYSTEMS. 2,4-D AMINE AT 2.0 AND 2.3 FL OZ/A AND 2,4-D LV6 AT 1.6 AND 2.0 FL OZ/A; OVERALL RESULTS SHOWED GOOD CROP SAFETY, GOOD TO EXCELLENT WEED CONTROL AND NO SIGNIFICANT YIELD DIFFERENCES.
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