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phenmedipham (Betanal, Spin-Aid) NYSDEC Approval of 2(ee) for Spin-Aid Herbicide 5/96

New York State Department of Environmental Conservation
Division of Solid & Hazardous Materials
Bureau of Pesticides & Radiation
Pesticide Product Registration Section
50 Wolf Road, Albany, New York 12233-7257
Phone 518-457-7446   FAX 518-485-8990
May 22, 1996
Mr. William G. Smith
Senior Extension Associate
Pesticide Management Education Program
Cornell Cooperative Extension
5123 Comstock Hall
Ithaca, NY 14853-09Ol
Dear Bill:
Re:  FIFRA 2(ee) Recommendation - Use of Spin-Aid Herbicide (EPA Reg.
     No. 45639-76) on Red Bests at Less Than Labeled Rates for
     Application at Earlier Growth Stages
The New York State Department of Environmental Conservation  has 
approved your request for a FIFRA 2(ee) recommendation for use of Spin-
Aid Herbicide (wPA Reg. No. 456 9-76) or. red beets at less than labeled 
rates for application at earlier growth stages.  Enclosed is a copy of 
the accepted recommendation.
Anyone using Spin-Aid Herbicide under this recommendation must have the 
recommendation in their possession at the time of application.
If you have any questions on this matter, please contact Jeanine 
Broughel, of my staff, at (5l8) 457-7446.
Maureen P. Serafini
Pesticide Product Registration Section
cc: R. Mungari - NYS Dept. of Agriculture and Markets
Proposed FIFRA 2(ee) Recommendation
Researcher and Title:  Robin R. Bellinder, Associate Professor, 
Department of Fruit and Vegetable Science, Cornell University, Ithaca, 
NY  14853.
Pesticide Name and EPA Registration No.:  Phenmedipham Spin-Aid 1 3EC 
Proposed Application Rate:  0.25 and 0.38 Ibs ai/A to be applied 
broadcast, postemergence to red (table) beets having cotyledon to 2 
leaaves and 2-4 leaves, respectively.
Nature of 2(ee) variation from the product label:  The chemical is 
currently labelled for application of 0.49 to 0.98 lb ai/A (3-6 pt) when 
spinach has 4 to 6 leaves, or more.  This recommendation is for the use 
of lower rates at earlier timings
Complete Recommendation:  Spin-Aid effectively suppresses several 
broadleaf weeds that are common in red beet fields and are only 
marginally controlled by other registered products.  Common 
lambsquarters and common chickweed are particularly sensitive to Spin-
Aid.  A single application of 0.49 lb ai/A (3 pts) at the 4-6 leaf stage 
of beets will only suppress weeds that have escaped earlier control 
strategies.  Low rates of Spin-Aid, 0.25 lb ai and 0.38 lb ai applied at 
two earlier timings will more adequately control sensitive weed species 
when they are small, with negligible crop injury.  Apply 0.25 lb ai/A 
(1.5 pt) when beets are in the cotyledon to 2-true leaf stage and 0.25 
to 0.38 lb ai (2 3 pt) when beets have 2-4 true leaves.  Under adverse 
weather conditions slight and usually transient injury has been observed 
in research trials.  Yield reductions have not been caused by this 
injury.  Tank-mixing low rates of Spin-Aid and low rates of Betanex 
(8etanex has been approved for use in red beets under a Section 18 for 
1996.) will improve weed control but may result in slightly greater crop 
injury than when either product is applied alone.  However, this injury 
has also not led to reduced yields in research trials.
Read and observe all cautionary statements and restrictions found on the 
product label.