Information Requests Monitoring System

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Request ID: 93
Request From: Steve Toth
Date Requested: Oct 15, 2004
Request: We received the following request for information from Philip Poli of USDA regarding the miticide dicofol. Please forward this information to colleages in your state for comment. Send any comments to us and we will forward them to Philip Poli and EPA. ----------------------------------------- Hello everyone: Below is a message from the Chemical Review Manager (CRM) for the pesticide Dicofol. Many of you sent me e-mails back in June concerning the use of Dicofol on crops in your regions. If you have any comment(s) or concerns about the attached EPA memo, then please send them to me and I will pass them to EPA. In case you want to contact the CRM at EPA directly her e-mail address is: hunter.mika@epa.gov Thank you for your time and interest. Phillip Poli Hi Phil, I just wanted to run a few things by you about dicofol...as we are trying to finally finish it! BEAD has been reviewing use on apricots, nectarines, peaches, and oranges, and has discovered that these crops are all below 5% crop treated. This is usually the cut-off for their benefit analysis. I am faced with the question of whether or not to have them continue with the above crops. Along with this info, BEAD also tells me that in California, for peaches, apricots, and nectarines, the use of dicofol has decreased each year. They site data from 2001-2003 to determine this trend. They could not determine whether or not this decline was due to mite resistance, or if better products are on the market and are cheaper, etc. I am trying to figure out exactly why we are seeing this trend to determine what value dicofol has to these growers. I am particularly curious because for pecans, dicofol use goes up each year and is very important to pecan growers (at least in Ga). The labels for dicofol state that the product should not be used two years in a row in order to prevent resistant mites. So I do not know if maybe the decrease is due to dicofol not being in the schedule. For example, peaches in cali in 1997 had 8% treated, in 1999 had 2% treated, in 2001 had 8% treated, and last year were back to 2%. Would you be able to add any information or have any contacts that you suggest I contact? Thanks for your help. Mika J Hunter Chemical Review Manager Special Review Branch Office of Pesticide Programs U.S. Environmental Protection Agency 703.308.0041

Responses
Responder: John Meyer
State: NC
Date Requested:
Response: I was under the impression that dicofol (Kelthane) was no longer labeled for use on peaches. I don't know of anyone who still uses it in North Carolina. John Meyer Department of Entomology North Carolina State University

Responder: Ken Sorensen
State: NC
Date Requested:
Response: Kelthane is used some by small peach growers, by strawberry growers, by pecan growers and greenhouse transplant growers. It is still effective if not used constantly and it represents a different class for resistance management. Kelthane is also used for broad mites and russet mites. I believe it has some effect on other insects and diseases. There are a number of miticides around and coming. They will replace Kelthane, but they can not replace its spot uses and need totally. Ken Sorensen Department of Entomology North Carolina State University

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