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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

OFFICE OF

PREVENTION, PESTICIDES, AND

TOXIC SUBSTANCES

**PC Code: 061501**

**DB Barcode: 333996**

**[MEMORANDUM]{.underline}** September 28, 2007

SUBJECT: **Paradichlorobenzene:** Addendum to EFED's Memorandum in
Support of the Reregistration Eligibility Decision

Number range CHAPTERTO: Molly Clayton, Chemical Review Manager

Kevin Costello, Chemical Review Manager

> RB3/SRRD (7508P)

FROM: Melissa Panger, Biologist

ERB4/EFED (7507P)

THRU: Betsy Behl, Chief

ERB4/EFED (7507P)

This is an addendum to '**Paradichlorobenzene:** EFED Memorandum in
Support of the Reregistration Eligibility Decision' (attached below)
that confirms only indoor uses of paradichlorobenzene remain for
reregistration (DP Barcode: 333996).

Para-dichlorobenzene is used for control of wax moths in empty beehives
(EPA Reg. No. 61617-2), but this is not an outdoor use. Label directions
instruct users to apply it at a maximum rate of 0.19 lbs a.i. for hives
in storage. Users are instructed to air out hives before reuse, because
residual para-dichlorobenzene would harm bees in a hive. In addition,
para-dichlorobenzene must not be present in populated hives, because the
odor of para-dichlorobenzene could be absorbed by the honey, and
para-dichlorobenzene has no food tolerances.

The USDA crop profile for honey bees in New Jersey indicates that
para-dichlorobenzene should be used for wax moth control if hive
components are to be stored inside. Wax moths can alternatively be
controlled by outside storage in freezing temperatures.
Para-dichlorobenzene is not used if that method of control is employed.

![](media/image1.wmf){width="1.2847222222222223in"
height="1.2541666666666667in"}

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

OFFICE OF

PREVENTION, PESTICIDES, AND

TOXIC SUBSTANCES

**PC Code: 061501**

**DB Barcode: 333996**

**[MEMORANDUM]{.underline}** May 8, 2007

SUBJECT: **Paradichlorobenzene:** EFED Memorandum in Support of the
Reregistration Eligibility Decision

Number range CHAPTERTO: Molly Clayton, Chemical Review Manager

Kevin Costello, Chemical Review Manager

> RB3/SRRD (7508P)

FROM: Greg Orrick, Environmental Scientist

ERB4/EFED (7507P)

THRU: Betsy Behl, Chief

ERB4/EFED (7507P)

This memo is to confirm that only indoor uses of paradichlorobenzene
remain for reregistration and that the Environmental Fate and Effects
Division (EFED) is not required to assess the ecological risk of indoor
uses. The last remaining outdoor use of paradichlorobenzene (Ferti Lome
Tree Borer Crystals; EPA Reg. No. 7401-123) is undergoing voluntary
cancellation. Federal Register Notices of Receipt of Requests to
Voluntarily Cancel Pesticide Registrations, dated 12/27/2006 and
2/28/2007, have been published, stating that the U.S. EPA intends to
grant these requests at the close of the comment periods unless the
Agency receives substantive comments within the comment periods that
would merit its further review of the request or unless the registrant
withdraws their request within these periods (*i.e.* by January 26, 2007
or August 27, 2007). Pending withdrawal or rejection of the voluntary
cancellation request and/or proposal of new outdoor uses, EFED will
conduct the appropriate ecological risk assessments.

To date, no environmental fate data have been submitted for existing
uses of paradichlorobenzene. To address risks to the environment posed
by accidental releases, 40 CFR Part 158 identifies an abbreviated set of
environmental fate data and ecological effects data for registration of
indoor uses:

-   Hydrolysis study; Guideline 161-1

-   Avian oral LD~50~ with bobwhite quail, Guideline 71-1

-   Avian dietary LD~50~ bobwhite, Guideline 71-2

-   Freshwater fish LD~50~ rainbow trout, Guideline 72-1

-   Acute LD~50~ freshwater invertebrate daphnia, Guideline 72-2

Therefore, these data are requested for reregistration of the indoor
uses of paradichlorobenzene.