UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C.  20460

OFFICE OF           

PREVENTION, PESTICIDES

AND TOXIC SUBSTANCES

MEMORANDUM

	Date:	3/30/06

			

	Subject:	Cloquintocet-mexyl on Wheat and Barley.  ADDENDUM to DP
Barcode 308470 re. Data Submitted to Satisfy Conditional Registration
Requirements for Use on Wheat, Revise Wheat Tolerances, and to Add Use
on Barley.  PP#’s 7E04920 and  4E06831.  			

		DP Number:	328047	Decision Number:	353510

		PC Code:	700099	MRIDs:	None

		40 CFR:	180.560	Chemical Class:	Herbicide safener

	From:	Nancy Dodd, Chemist

		Registration Action Branch 3

		Health Effects Division (7509C)

	Through:	George Kramer, Ph.D., Chemist

		Registration Action Branch 1

		Health Effects Division (7509C)

	To:	Daniel Rosenblatt/Tracy H. Ward, RM 05

		Minor Use, Inerts, and Emergency Response Branch

		Registration Division (7505C)

In DP Barcode 308470 (N. Dodd 11/16/05), HED indicated (as part of
Deficiency #4) that “the wheat field trials are not adequate in number
or geographic representation.  Because the data for the winter wheat
treated in the fall will not be used, the number and geographic
representation for the wheat field trials are not adequate.  An
additional 8 field trials are needed for adequate geographic
representation as follows: 1 trial in Region 2, 1 trial in Region 4, 1
trial in Region 5, 1 trial in Region 6, and 4 trials in Region 8.”

HED has now determined that the wheat field trials are adequate in
number and geographic representation.  The winter wheat treated in the
fall (MRID 46012904) will not be used for forage and hay data since the
proposed use does not include a fall application, but acceptable data on
forage and hay are available from winter wheat treated in the spring
(MRID 46012905).   Since the “winter wheat treated in the fall (MRID
46012904)” was treated in the fall before harvest of forage and hay
but was also treated in the spring before harvest of grain and straw,
the grain and straw data represent a spring application and can be used.
 Therefore, adequate data are available for all four commodities
(forage, hay, grain, and straw) and the field trials are adequate in
number and geographic representation.   

cc: William Cutchin (RD), Hope Johnson (RD), Pauline Wagner (RD), Jim
Thompkins (RD), Leung Cheng (HED)

RDI: N. Dodd (3/30/06); G. Kramer (3/30/06)										

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Cloquintocet-mexyl	Summary of Analytical Chemistry and Residue Data	DP
Barcode: 328047

