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Fosetyl-Al - Major Label Change for Aliette 7/01

New York State Department of Environmental Conservation
Division of Solid & Hazardous Materials
Bureau of Pesticides Management
Pesticide Product Registration Section
625 Broadway, Albany, New York 12233-7257
Phone 518-402-8768 FAX 518-402-9024

July 20, 2001


Ms. Linda Aschbrenner
State Registration Specialist
Aventis CropScience USA LP
c/o Aventis CropScience
PO Box 12014
Research Triangle Park, NC 27709-2014

Dear Ms. Aschbrenner:

Re: Registration of a Major Change in Labeling for the Active Ingredient Fosetyl-Al (aluminum tris (O-ethyl phosphonate)), Contained in the Pesticide Product ALIETTE WDG Fungicide (EPA Reg. No. 264-516)

    The New York State Department of Environmental Conservation (the Department) has reviewed your application, received May 15, 2001, to register the above-mentioned product in New York State. ALIETTE WDG Fungicide contains the active ingredient fosetyl-Al and is currently registered for use on numerous crops in New York State. The new ALIETTE WDG Fungicide label adds the use of the product on grapes as well as various other crops. Grapes are considered a major crop in our State and are grown extensively on Long Island.

    Long Island has a vulnerable sole-source drinking-water aquifer and the Department has concerns regarding the potential for groundwater contamination as a result of the addition of grapes to the ALIETTE WDG Fungicide label. Therefore, the proposed use of ALIETTE WDG Fungicide on grapes represents a major new use pattern for the active ingredient fosetyl-Al in New York State.

    The Department has reviewed the information supplied to date in support of registration of the major change in labeling application of ALIETTE WDG Fungicide (EPA Reg. No. 264-516).

    Our groundwater staff stated that the half-life of fosetyl-Al, under aerobic laboratory conditions, is between 1 and 1.5 hours in loamy sand, silt loam and clay loam, and 20 minutes in sandy loam soil. The degradation proceeds through the hydrolysis of the ester bond, resulting in the formation of phosphorous acid and ethanol. The ethanol is further degraded into carbon dioxide. Based on the short half-life of fosetyl-Al and the known fate of phosphates under anaerobic conditions, the United States Environmental Protection Agency determined that an anaerobic soil metabolism study was not necessary. An anaerobic aquatic soil metabolism study was conducted. The half-life, when anaerobic conditions were established by flooding soil, was 40 hours with silty clay loam and 14 hours with sandy loam soil.

    The potential for groundwater and/or surface water contamination by fosetyl-Al and its degradates is expected to be very low, in most cases, due to the rapid degradation of the compound in soil to non-toxic degradates under both aerobic and anaerobic conditions. No adverse effects to groundwater/surface water are anticipated through the normal use of ALIETTE WDG Fungicide as labeled.

    Therefore, the Department hereby accepts for general use registration in New York State the major change in labeling for ALIETTE WDG Fungicide (EPA Reg. No. 264-516).

    Enclosed are your New York State stamped "ACCEPTED" label and a copy of the Certificate of Registration.

    If you have any questions, please contact me, at (518) 402-8768.


Maureen P. Serafini
Bureau of Pesticides Management


cc: w/enc. - N. Kim/D. Luttinger - NYS Dept. of Health
R. Zimmerman/ R. Mungari - NYS Dept. of Ag. & Markets
G. Good/W. Smith - Cornell University, PMEP