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imazapyr, isopropylamine salt
NYS DEC Letter - Application to Register Habitat Release Herbicide 3/00


New York State Department of Environmental Conservation 
Division of Solid and Hazardous Materials
Bureau of Pesticides Management, Room 498 
Pesticide Product Registration Section
50 Wolf Road, Albany, New York 12233-7257 
Phone: (518) 457-7446 - FAX: (518) 485-8990 
Website: www.dec.state.ny.us/website/dshm/pesticid/pesticid.htm


March 13, 2000


CERTIFIED MAIL
RETURN RECEIPT REOUESTED


Ms. Michaeleen E. Linahan 
State Registration Manager 
American Cyanamid Company 
P.O. Box 400
Princeton, NJ 08543-0400


Dear Ms. Linahan:


Re:  Application to Register HABITAT® Release Herbicide (EPA Reg. No. 241-401)


This is in response to your application, received on October 28, 1999, to register 
HABITAT® Release Herbicide (EPA Reg. No. 241-401) containing the active ingredient 
isopropylamine salt of imazapyr (2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-
1H-imidazol-2-yl]-3-pyridinecarboxylic acid).


Isopropylamine salt of imazapyr is approved for use in terrestrial nonfood crop sites in 
New York State. The proposed fores	use pattern represents a major change in labeled (MCL) 
use pattern for isopropylamine salt of imazapyr. Specifically, the following label text 
introduces the potential for significant impact to nontarget organisms and the environment:

HABITAT Release Herbicide may be applied in forestry sites (land managed for timber 
production) on areas defined as puddles, potholes, berms of ditches, drainage ditches, 
intermittent drainage, intermittently flooded low lying sites, seasonally dry flood plains, 
and transitional areas between upland and lowland sites except in the state of California. 
It is permissible to treat marshes, swamps, and bogs after water has receded, as well as 
seasonally dry flood deltas except in the state of California.


In addition to the documents submitted with your initial application, you must submit four 
copies of the following information before your MCL application can be considered:

Items number 4, 5, 6, 7, 8, and 9 listed in Appendix 1, Section B of "New York State 
Pesticide Product Registration Procedures" (August 1996). A copy of this document is 
enclosed for your reference. The format for submission is addressed in Appendix 2 of the 
guidance booklet.
 
 
Please note that, in addition to the above-specified documents, the New York State Department 
of Environmental Conservation (the Department) may request reasonable additional information 
from your company when such information is necessary to make a registration decision.


In order for the Department to pursue the review of the referenced application, please 
submit the required information to this office within 45 days of receipt of this letter. 
Failure to submit the required information will result in termination of the review process 
and denial of the application.


After the specified 45-day deadline, American Cyanamid Company may re-submit the referenced 
application. This major change in labeled use pattern application must be accompanied by a 
new application fee and meet the requirements specified in "New YorkState Pesticide Product 
Registration Procedures" (August 1996).


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


Sincerely,

Maureen P. Serafini 
Chief
Pesticide Product Registration Section

Enclosure