Information Requests Monitoring System

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Request ID: 114
Request From: Steve Toth
Date Requested: Mar 29, 2005
Request: Note the following request for information regarding EBDC fungicides from EPA. Please circulate this request to experts in your state/territory and submit the responses to the Information Request System. No deadline has been given, so please try to submit responses within two weeks (by April 12). Thanks. Steve Toth ---------------------------------------------------- The OPP EBDC's team needs your help with two questions. (1) EPA would like to transition growers from wettable powders to dry flowables and/or water soluble packages to mitigate worker risks. We specifically would like to know about the following products: Maneb 80 Mancozeb 80 WP Acrobat Dithane M-45 WP (also available as dry flowable) Manzate 80 WP Penncozeb 80 WP. These products are used on a variety of crops in several states, all of which are listed in the attached MS Word Document. (See attached file: Use of Mancozeb and Maneb in Wettable powder form by state and crop.doc) (2) How many applications of mancozeb are made to cut flowers on a yearly basis? We need this information to refine the worker risk assessments. Thanks for your help with this! Please feel free to call with any questions. Christina Scheltema Chemical Review Manager Reregistration Branch 3, Special Review and Reregistration Division EPA's Office of Pesticide Programs phone (703)308-2201; FAX (703)308-8005

Responses
Responder: Chuck Johnson
State: VA
Date Requested: Apr 04, 2005
Response: Mancozeb has been applied to tobacco in Virginia primarily in 2 forms, as Dithane Rainshield for disease control in tobacco seedling float-production systems (greenhouses) and as a premix component in Acrobat MZ in the field. I understand that this year (2005 growing season) or soon thereafter Acrobat MZ will no longer be available and farmers will have to purchase Acrobat and Dithane Rainshield separately and tank-mix the two products. I am not sure how many applications of Dithane are made, on average, in tobacco greenhouses. Perhaps 2-3. Acrobat MZ is applied probably about 3 to 5 times each year to our burley tobacco crop in Southwest Virginia (typically about 9-10,000 acres, about 2,500 acres in 2005(?)). Of course, the number of applications can vary signficantly from year-to-year based on weather, and a significant proportion of growers won't spray either in the greenhouse or field. If you have any further questions, just let me know at spcdis@vt.edu

Responder: Mark Mossler
State: FL
Date Requested: Apr 12, 2005
Response: I was able to query three field-grown cut flower producers in FL. Based on the species, mancozeb may be applied for 7 months a year on either a 10-day basis or 30-day basis, which gives a range of 7 to 21 applications per year.

Responder: Charles Luper
State: OK
Date Requested: Apr 12, 2005
Response: Moving maneb to dry flowables and/or water soluble packages would not be a big deal for Oklahoma Watermelon growers. As long as product can still be used especially for rotation of mode of actions to decrease fungicide resistance.

Responder: Henry Fadamiro
State: AL
Date Requested: Apr 12, 2005
Not Important/Relevant to my state(s)
Response: There are a few, scattered field cut flower businesses in Alabama, but there is no information on the use of the fungicides, Mancozeb and Maneb.

Responder: Colleen Warfield
State: NC
Date Requested: Apr 29, 2005
Response: I recommend mancozeb all the time, but have no clue as to whether or not growers are using a wettable powder. But mancozeb, as an active ingredient, is certainly used on ornamentals in North Carolina. Colleen Warfield Department of Entomology North Carolina State University

Responder: Turner Sutton
State: NC
Date Requested: Apr 29, 2005
Response: I think most apple growers use or prefer the dry flowables if they are equally priced. Its really not an issue with apples. Turner Sutton Department of Plant Pathology North Carolina State University

Responder: Keith Yoder
State: VA
Date Requested: Apr 29, 2005
Response: I forgot to get back to you about this formulation question. Last week I ask about this at our in-depth fruit school. The general consensus among fruit growers is that DF's and WDG's are widely preferred over wettable powders. This is the way I thought it to be ever since the dry flowable types of fungicides started to come available 10-15 years ago -- growers prefer DF's and WDG's even when they expect to pay a little more for them. Also, on a related question (I was talking to Rich Michell, EPA today) there tends to be more of a problem with WP's in water soluble pouches because of mixing/suspension issues and because the amount in the bag may not fit the desired rate. Rich also had the question about aerial application of EBDC's and I told him that in 29 years experience in Virginia I am not aware of any aerial application of any fungicide to tree fruits. Keith S. Yoder Virginia Tech University

Responder: Robert (Bob) Bellinger
State: SC
Date Requested: May 10, 2005
Response: Steve, FYI, I did not receive a response from any of the four individuals I sent this to. (We had only watermelon on the list.) Bob B.

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