October 16, 2014 Mr. James Parker Environmental Protection Agency Office of Pesticide Programs Risk Management and Implementation Branch I Pesticide Re -evaluation Division (7508P) One Potomac Yard 2777 South Crystal Drive Arlington, VA 22202 

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Cc: Ms. Shaja Joyner; EPA Product Manager Team 20; Mail Drop 750SP RE: Dicloran (DCNA) Reregistration Generic Data Call -In (GDCI-D31301 -27262) Dear Mr

. Parker, Thank you for your and Mr

. Moriarty's time on October 2, 2014 to discuss EPA's letter of August 26, 2014 regarding the outstanding data requirements for dicloran (DCNA.) In our meeting we described the changing market needs for this product and reported that many significant uses can now be deleted from the label. A limited number of minor uses are still important to the growers and will be maintained

. It is our understating that with these limited uses many data requirements listed in the above mentioned letter are now obsolete. We propose to perform the relevant residue chemistry and non-target data as outlined in the table below

. Gowan wi ll voluntarily cancel the following crops and application· 

### Uses Proposed to be Removed Uses Maintained Application through backpack mist blower Celery Apricots Fennel Grapes Endive Peaches Onions/garlic/shallots Nectarines Snap beans Plums/Prunes Sweet potato Sweet Cherries Lettuce (leaf/head) Greenhouse cucumbers Greenhouse lettuce Greenhouse rhuba rb Greenhouse tomato Chrysanthemums Gladiolus Roses Conifers Page 

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### Dicloran Reregistration DCI

### Gowan is proposing to conduct the studies as detailed in Tables 1-4 below

. These stu d ies will be 

### conducted in 2015 and could be subm itted to the agency by Septembe r 30, 2016 contingent upon the avai lability ofthe contract laboratories and your approval ofthe proposed plan. Tab le 1- Occupational 

### & Residential Exposure Data Requirement Guideline EPA Status 8/26 /-2014 Gowan Proposa l10/2/2 014 875.1 1 00- Dermal Exposure Waived n/a 875.1300 -Inhalation Exposure Waived n/a 875.2100- Foliar Dislod gea bl e Waived n/ a Residue 875.2800- Description of Human Past due data for Label restrict ion applied Act ivity backpack mist blower Waiver is applicable

Table 2- Plant Residue Chemistry Data Requirements Guideline EPA Status 8 /26/2014 Gowan Proposall0/2/20 14 860.1300- Nature of the Residue Dat a submitted and waiver n/a

- Plant su bmitted Waived 860.1340- Residue Ana lytica l Waiver Requested Gowan w i ll conduct M ethod Waiver Denied: Storage Stability is required to complement MOR of residue data requirement 860.1500- Succulent bean Waived Waived 860. 1500- Crop field trial - Waived C

ucumber 860.1500- Crop field tria l- EPA will use results of cherry Waived Peach crop field trial study furthe r refine metabolite rat io Note : Cherries removed fro m determined in peach trial th e label 860

. 1500 - Crop field trial - Waived n/a Plum EPA will use results of che rry field trial study to furth e r refine note: plum removed f rom label metabolite ratio determ i ned in pea ch metabolism stu dy 860.1500- Crop field trial - Waived n/a Grape EPA wil l use results of cherry note : grapes removed from**Ia~ ~~**  

### crop fie ld trial study further refine metabolite ratio determined in peach tria l

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### 860.1500- Crop field trial - Waiver pending; contingent On ion, garlic an d shall ots Garlic upon modification of DCNA currently have the same use prod uct label; translate onion d i rection s on all end use labels Page2of5 

### Dicloran Reregistration DCIdata to garlic Waiver is applicable h860.1500- Crop field trial - Waiver pending; contingent See above Shallot upon modification of DCNA product label; translate onion data to garlic 860.1500- Crop field trial - Waiver pending; cont ingent Fennel and celery current ly have Fennel upon modification of DCNA the same use directions on all prod uct labels Gowan must labels change label use directions on DCNA products to make fennel match celery; translate celery Waiver is applicable data to fennel 860.1500 - Crop field trial - Waiver pending; contingent Rhubarb upon modification of DCNA Note: rhubarb is removed from product labels Gowan must labels change label use directions on DCNA products to make rhubarb Waiver is applicab le match celery; translate celery data to rhubarb 860.1500 -Crop field trial - Waiver pending; contingent Note: apricots are removed from Apricot upon modification of DCNA all labels product labels Gowan must change label use directions on Waiver is applicable DCNA products to make apricot match other stone fruits 860.1500- Crop field trial - Wavier denied Per guideline (EPA guidance: Sweet Potato The Agency agrees to remove "case by case"); OECD 1 2/2011 req uire ments for analysis for the Guidance Doc on Crop Field degradate "unknown 1"; Trials #93 : 4 trials to be samples should be analyzed for conducted; DCNA and DCHA; residue of parent and DCHA. post-harvest residue data and tolerance would be protective of plant bed uses. 860.1500- Crop field trial - Analyze samples for both parent Note : Cherry removed from Cherry and DCHA; labels ratio (DCNA/DCHA) to peach Waiver is applicable and plum Waiver denied 

# ___J 860.1500- Crop field trial - Dry Waive r denied Per EPA guideline, 8 t rials ( 1o 

# I bulb onion EPA removes the requirement samples) to be conducted in the for analysis of the degradate 2015 growing season; DCNA 

### & "Unknown 1 "; continue to apply DCHA residues degradate "Unknown I" factor for risk assessment purposes; Page 3 of 5 

### Dicloran Reregistration DCIsamples should be analyzed for residues of parent and DCHA n860.1520 - Processed Waiver requested Tomato removed from label; food/feed - Tomato Waiver denied Waiver is applicable 860.1520 - Processed food/feed Waived n/a Potato 860.1520 - Processed food/feed Waiver denied Grapes removed from label; grape Waiver is applicable 860.1520- Processed food/feed Waiver denied Plums removed from label; Plum Waiver is app licable 860.1900 - Field Rotational Crop Waiver denied Field rotational study to be conducted in 2015 to dete rmine plant back intervals Table 3 - Terrestrial/Aquatic Non-target Data Requirements Guideline EPA Status 8/26/-2014 Gowan Status 10/2/2014 850.1025 - Oyster Acute toxicity Waiver submitted and data Gowan will conduct this study in test referenced 2015; Waiver Denied 850

. 1075 - Estuarine/Marine Waiver submitted for n/a Fish Acute estuarine/marine species. Wa iver granted 850.1075 - Freshwater Fish Acute Data available n/a toxicity test 850 .1400- Fish Early Life Early Waiver submitted and data Gowan will conduct this study in Stage (freshwater) test submitted; 2015 Waiver denied 850.2300 - Avian/Mallard duck Data submitted n/a reproduction Data classified as acceptable 850.4100 - Seedling Emergence Waiver request; waiver denied Gowan will conduct this study in Tier 1 Due date extended to Jul 29, 2015 2010 850.4100 - Vegetative Vigor Waiver request; waiver denied Gowan will conduct this study in Due date extended to Jul 29, 2015 2010

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### Dicloran Reregistration DCITable 4- Summary ofToxicological Data Requirements Guideline EPA Status 8/26/-2014 Gowan Status 10/2/2014 870.346S- 90/28 Day inhalation Waiver requested Pend ing reregistration risk Toxicity Waiver denied assessment on attached revised label 870.6300- Developmental Waiver requested Pending reregistration risk Neurotoxicity Waiver denied assessment on attached revised label Registrant may conduct an acute/subchronic neurotoxicity study (GLN 870.6200) to potentially defer the GLN 870.6300 requirement

Per your request we are attaching the following proposed labels with the remaining crops and use patterns. 

### 1. Botran P SF, EPA Reg. No. 10163-329 2. Botran SF, EPA Reg. No

. 10163-226 3. Botran 7S-W, EPA Reg. No. 10163-189 4. Botran Technical, EPA Reg. No. 10163-195 Gowan appreciates the Agency's consideration and time on this fungicide. Ifthere are questions regarding this p roposal, please contact Nina Wilson at 928-819- 1SS2 or at**n~** 1lson@gowanco.com or Kyla Smith at 928-819-1S31 or ksm ith@gowanco.com

. Regards,

# 1(~· Nina Wilson Regulatory Scientist Gowan Company 370 South Main Street Yuma, AZ 8S367

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