UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C

. 20460 

### JUN 11 2015

MEMORANDUM OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

SUBJECT: BEAD Chemical Profile (BCP) for Registration Review: Diphenylamine (038501) FROM:

THRU: Carl Chen, Plant Pathologist Biological Analysis Branch Donald Atwood, Entomologist 

# &**~**

# #.**~** Science Information and Analysis Branch Stephen Smearman, Economist }L

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## A.**~** Economic Analysis Branch**~** Biological and Economic Analysis Division (7503P) Arnet Jones, Chief Biological Analysis Br

TO: Roy Johnson, Chemical Review Manager Risk Management and Implementation Branch 5 Pesticide Re-evaluation Division (7508P)
Product Review Panel date: May 27, 2015

Page 1The Biological and Economic Analysis Division (BEAD) Chemical Profile (BCP) provides an overview ofthe pest management role and quantitative usage information available for a pesticide. Information provided in this BCP may be used by stakeholders (e.g., users and registrants), Office ofPesticide Programs (OPP) risk and benefit assessors, OPP risk managers, and the general public during the Registration Review process ofdiphenylamine (DPA). DPA was registered in the United States in 1947. It is registered under Section 3 ofthe Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) as a growth regulator for use on apples. Its end-use products are formulated as an emulsifiable concentrate, soluble concentrate, or pressurized gas (NPIRS, 2015). Application is made as a post-harvest treatment with dipping, drenching, spraying, and thermal fogging (PPLS, 2015). DP A is only used post-harvest for reduction ofscald on apples in storage. Scald is a physiological disorder that causes browning ofthe skin in storage rendering the apple unacceptable for fresh market (USDA, 2001). Apples are treated with the anti-scald agent after harvesting prior to placing in storage. In case ofprolonged storage (4 months or longer) or particularly high danger ofscald due to climatological conditions, a second treatment is applicable between the second and third months ofstorage (PPLS, 2015). In Washington, DPA is applied with thiabendazole to fruit that is susceptible to scald and fruit rot (USDA, 2001). There have been no BEAD benefits assessments orFIFRA Section 18 emergency exemption requests for DPA in the last 10 years. While an emergency exemption request may yield information about a chemical's importance or value that is not found in other EPA records, the lack ofa FIFRA Section 18 assessment by BEAD does not specifically indicate the relative importance ofthis chemical. Quantitative usage information for DP A is only available from the California Department of Pesticide Regulation Use Report (CDPR). It reported that approximately 250 pounds ofactive ingredient were used on average annually between 2009 and 2013 in California on apples (CDPR, 2015). Obtaining the following information may improve future assessments related to the use and importance ofDPA: 1) total pounds ofactive ingredient applied per year on a national and/or regional basis; 2) percent crop/site treated; 3) application rates: typical and maximum; 4) frequency and intervals ofapplication; and 5) efficacy information/product performance. REFERENCES CDPR. 2015. Summary ofPesticide Use Report (PUR) Data-Indexed by Chemicals. 2009- 2013. California Department ofPesticide Registration (CDPR). Accessed May 2015 at http://www.cdpr.ca.gov/docs/purmain.htm
. NPIRS. 2015. Diphenylamine formulation/use information. National Pesticide Information Retrieval System (NPIRS). Accessed May 2015 at http://npirs.ceris.purdue.edu
. PPLS. 2015. EPA-approved diphenylamine products/labels. The Pesticide Product Label System (PPLS). Accessed May 2015 at http://ofmpub.epa.gov/apex/pesticides/f?p=PPLS:l. USDA. 2001. Crop Profile for Apples in Washington. The Western Integrated Pest Management Center. United**State~** Department ofAgriculture (USDA). Accessed May 2015 at http://www.ipmcenters.org/cropprofiles/docs/WAApples.pdf
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