Information Requests Monitoring System

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Request ID: 155
Request From: Steve Toth
Date Requested: May 11, 2006
Request: Please note the following information request from USDA regarding malathion ULV application rates. Distribute to the experts in your respective states/territories and forward the responses to the Southern Region IPM Center Information Requests Monitoring System by Friday, May 19, 2006. Steve Toth ------------------------------------------------------------------ Thank you for your responses to our request of several weeks ago for feedback for Table One concerning WP and EC formulations of malathion. In this email I am forwarding EPA's request for information concerning ULV formulations of malathion. Besides asking for feedback on the EPA proposed use rates, interval between application, PHIs and REIs for ULV formulations, we are requesting feedback on buffers for aerial applications (no buffers were being proposed for EC and WP formulations). Note: Your are also requested for feedback for EC/WP formulations for use on blueberries. ULV malathion use for cotton is being addressed separately. Post-harvest grain and grain-bin uses were contained in Table One. (See attached file: Malathion cover letter to Table 2- malathion ulv - max and typical vs EPA proposed.doc) (See attached file: Malathion - Table 2 for malthion- ulv frmlations - max and typ v EPA proposd 5-5-06.doc) Because EPA must meet an FQPA deadline of August 2006, we are requesting your feedback by COB Monday May 22. Please do not hesitate to contact me if you have any questions. Please do not hesitate to contact me if you have any questions or comments. Best regards, Teung ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Teung F. Chin, Ph.D. Biological Scientist Office of Pest Management Policy Agricultural Research Service United States Department of Agriculture LOCATED AT: USDA Animal & Plant Health Inspection Service 4700 River Road, Unit 149 (Room 3D-06.8) Riverdale, MD 20737-1237 Phone (301) 734-8943 Fax (301) 734-5992 Teung.F.Chin@usda.gov http://www.ars.usda.gov/opmp

Responses
Responder: Mark Mossler
State: FL
Date Requested: May 15, 2006
Not Important/Relevant to my state(s)
Response:

Responder: Mark Mossler
State: PR
Date Requested: May 15, 2006
Not Important/Relevant to my state(s)
Response:

Responder: Mark Mossler
State: VI
Date Requested: May 15, 2006
Not Important/Relevant to my state(s)
Response:

Responder: Roy Parker
State: TX
Date Requested: May 15, 2006
Response: TEXAS - ULV MALATHION USE IN SORGHUM FOR SORGHUM MIDGE For control of sorghum midge, Contarinia sorghicola (Coquillet), in sorghum a rate of 0.93 lb ai/acre should be retained to gain the residual activity for daily movement of female sorghum midge into the crop being protected. All treatments would require the higher rate or at least the option to use the higher rate. The label has a range of 0.62 - 0.93 lb ai/acre. It would be used on a maximum of 10% of the sorghum acreage in Texas during any one year with a maximum of 4 applications applied at 72 hour intervals. Typically, however, only two applications spaced at a 72 hour interval would be needed based on movement of sorghum midge into blooming stage sorghum. Currently nearly all sorghum requiring midge control is being treated with pyrethroid insecticide. There are reasons to retain the option to use ULV malathion at the rate and interval listed.

Responder: Roy Parker
State: TX
Date Requested: May 15, 2006
Response: TEXAS - ULV MALATHION (REVISED COMMENT): For sorghum midge in sorghum a rate of 0.93 lb ai/acre should be retained to gain the residual activity for daily movement of female sorghum midge into the crop being protected. All treatments would require the higher rate or at least the option to use the higher rate. The label has a range of 0.62 - 0.93 lb ai/acre. It would be used on a maximum of 10% of the sorghum acreage in any one year with a maximum of 4 applications applied at 72 hour intervals. Typically, however, only two applications spaced at a 72 hour interval would be needed based on movement of sorghum midge into blooming stage sorghum. Currently nearly all sorghum requiring midge control is being treated with pyrethroid insecticide. There are reasons to retain the option to use ULV malathion at the rate and interval listed.

Responder: Jack Bacheler
State: NC
Date Requested: Jun 01, 2006
Response: No present uses for North Carolina presently- but things could change in a big way if the Boll Weevil Eradication Program fails. There some major problems with containment programs in Arkansas, Missouri and Tennessee. Our present North Carolina aerial application buffer restrictions for insecticides are probably more stringent than possible restrictions imposed by the EPA. Jack Bacheler Extension Entomologist North Carolina State University

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