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Halosulfuron-Methyl - Supplemental Label Proposal 8/99

New York State Department of Environmental Conservation
Division of Solid & Hazardous Materials
Bureau of Pesticides Management
Pesticide Product Registration Section
50 wolf Road, Albany, New York 12233-7250
Phone 518-457-6934 FAX 518-457-0629
Website: http://www.dec.state.ny.us/website/dshm/Resticid/pesticid.htm
E-Mail: ppr@gw.dec. state. ny.us

August 16, 1999

CERTIFIED MAIL
RETURN RECEIPT REQUESTED

Ms. Tonya R. Staniforth
State Registration Specialist
Monsanto Company
800 North Lindbergh Boulevard
St. Louis, MO 63167

Dear Ms. Staniforth:

Re: Permit® Herbicide (EPA Reg. No. 524-465) Proposal for Supplemental Label for
    Postemergence Applications to Sweet Corn and Popcorn

This is in response to your submission; dated June 24, 1999, of a supplemental label for
the pesticide product Permit' Herbicide (EPA Reg. No. 524-465) containing the active
ingredient halosulfuron-methyl. Halosulfuron-methyl is currently registered in New York
State for use: 1) as a selective herbicide for the control of listed annual broadleaf weeds
and nutsedge in field corn, field corn grown for seed, grain sorghum (milo), and fallow
ground; 2) as a selective herbicide for postemergence control of sedges such as purple and
yellow nutsedge in established lawns, ornamental turfgrass; 3) on roadsides and other
industrial sites and for horsetail control.

The Permit® Herbicide supplemental label (Print Plate No. 39003X3-16) proposes to expand the
approved uses to include postemergence applications to sweet corn and popcorn. Use on sweet
corn introduces the potential for Permit' Herbicide use on Long Island. Therefore, you must
submit the supplemental label as a major change in labeled (MCL) use pattern application.
This application must be accompanied by an application fee and meet the requirements listed
in Appendix 1.B. of "New York State Pesticide Product Registration Procedures" (August 1996).
A copy of this document is enclosed for your reference.

Please note that the Department's review of halosulfuron-methyl as a new active ingredient
identified the potential for significant adverse effects to nontarget aquatic plants
resulting from use of Permit' Herbicide as labeled on field corn, field corn grown for
seed, grain sorghum (milo). Monsanto Co. should be prepared to address the risk to aquatic
macrophytes resulting from the proposal to expand the approved uses to include postemergence
applications to sweet corn and popcorn. The MCL application must also include the protocol
and results of the small scale prospective groundwater monitoring study (§ 166-1) required
as a-condition of the FIFRA sec. 3(c)(7)(A) registration for Pen-nit' Herbicide (EPA Reg.
No. 524-465) issued on December 15, 1994.

If you have questions on this matter, please contact Mr. Michael Radzevich, of my staff,
at (518) 457-7446.

Sincerely,

Maureen P. Serafini
Chief
Pesticide Product Registration Section