RTW/EPA/C547 

Page 1 of 2 

March 6, 2014 

Document Processing Desk (Propargite Registration Review) 

Pesticide Re-evaluation Division 

Office of Pesticide Programs (7508P)

Office of Chemical Safety and Pollution Prevention 

U.S. Environmental Protection Agency 

2777 S. Crystal Drive 

Arlington, Virginia 22202-4501 

Attention: Ms. Wilhelmena Livingston 

Re-evaluation Division Risk Management and Implementation Branch 

IV (7505P) 

Subject: Proposed Propargite Label Changes/Pending Registration Review 

- Initially Presented in Meeting Notes: Propargite Salmonid 

Teleconference on December 13, 2012 with EPA & NMFS/NOAA. 

Omite Technical (400-095), Omite-57E (400-083), Omite-6E (400-

089), Comite (400-104), Comite II (400-154), Omite-30WS (400-

427), Omite-30W (400-565) 

Dear Ms. Livingston, 

In mid-February 2014 you asked Chemtura Corporation if we would re-visit some proposed 

propargite label changes that were offered during the salmonid BiOp discussions with EPA & 

NMFS/NOAA as related to a joint teleconference on December 13, 2012. Such would be 

incorporated in the soon to take place draft Work Plan assessments for propargite, although 

the salmonid final BiOps court-ordered date is currently on hold/to be published. Chemtura 

has already done/will submit the following in all associated propargite formulation labels 

during the Registration Review process by the end of 2014. Status/comments are added in 

[brackets] for informational purposes. 

- A ‘fast-track’ label amendment at EPA concerning Comite II (400-154) has been 

replaced with a label additionally exhibiting “NOT TO BE USED IN CALIFORNIA, 

IDAHO, OREGON OR WASHINGTON”. This reinforces our previous statement that 

this formulation is not used west of the Rocky Mountains. [EPA stamped the label on 

Feb. 8, 2013] 

- A correction to “Summary of all active labels for pesticide products containing 

propargite (Chemtura comments rtw Oct. 23, 2012)” for 400-104/CA-820083 SLN on 

cotton was given. The single application rate, maximum number of applications per 

year, and annual application amount do correspond to that on the federal label (1.6 lbs 

Chemtura Corporation 

199 Benson Road 

Middlebury, CT 06749 

203-573-2000 tel

203-573-2958 fax

www.chemtura.com
Ms. Wilhelmena Livingston 

March 6, 2014 

EPA/RTW/547 

Page 2 of 2

a.i. per acre, 2, and <3.3 lbs a.i. per acre, respectively). [this was an informational 

comment at the time] 

- Add statement suggesting inclusion of a drift control agent in the spray tank. 

- For applications in the 4 states of concern: “Choose only nozzles and pressures that 

produce a medium or coarse droplet size (>250 microns volume median diameter).” 

- For aerial application in the 4 states of concern: limit aerial application volume to ≥10 

gallons per acre. 

- Currently 400-104/CA-830024 SLN on alfalfa exhibits no maximum application 

number per year; this will be changed to no more than 2 applications per year. 

[approved in California April 23, 2013] 

- Since the non-bearing avocado use was removed from labeling, the walnut use 

exhibited the highest single application rate. The walnut use rate will be reduced from 

4.5 lbs a.i./acre to 3.2 lbs a.i./acre. This rate is now equivalent to some other crops as 

the highest labeled rate for propargite. 

Although not part of the discussion, additionally Chemtura will also reduce the maximum 

application number from 3 to 2 for roses/ornamentals. Thus 2 applications will be the 

maximum number across all formulations and all crops. Any contrary SLNs outside these 

states will also be amended. 

Should you have any questions regarding this communication, please contact R. Tim Weiland 

at 203-573-2027 or email: tim.weiland@chemtura.com. 

Sincerely, 

Chemtura Corporation 

Allen R. Blem 

Crop Registration Manager, North America 

Copy: Richard Gebken, EPA Insecticide Branch, PM Team 10