Information Requests Monitoring System

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Request ID: 142
Request From: Steve_Toth
Date Requested: Oct 26, 2005
Request: USDA OPMP has requested an immediate response to a question from Cheminova regarding application rates for malathion on citrus in FL, TX, CA and AZ. Mark, Don, Doug and Mark: Please forward this request to the experts in Florida and Texas and submit their responses to the Southern Region IPM Center Information Request Monitoring System by next Wednesday, November 2. Thanks. Steve Toth ------------------------------------------- The registrant for malathion (Cheminova) has requested USDA feedback for citrus uses in FL, CA, AZ and TX. What is the maximum single application rate needed by growers for each the ULV and EC formulations? Your answer in the next week would be greatly appreciated. Thank you in advance! Teung -------------------------------------------------------------------------------------------------------------------------------- Per Cheminova: "We are trying to figure out the application rates for the EC and ULV formulations of malathion that might be important to citrus growers. The ULV label rate is 0.175 lbs ai/A and the EC label rate is 6.25 lbs ai/A. Can you help us define the maximum single application rate needed by growers for each formulation? I suppose we need to check all the major citrus growing states: FLA, CA, AZ and TX." Per Teung: I believe the 0.175 lb rate is for the fruit fly bait quarantine use. Per the Crop Profiles: Louisiana - Malathion 57 EC applied post-bloom at 1.75 pt. 100% (Formulation/100 gal and % of citrus acres receiving at least one application/season) Arizona - Malathion is not mentioned in the citrus crop profile (I assume then, that malathion is not being used in AZ?) Florida - Malathion is not mentioned in the citrus crop profile. Per recent conversation with FFFVA, malathion is not being used by Florida citrus growers. California for - Cottony Cushion Scale. No rate listed. Please do not hesitate to contact me if you have any questions or comments. Best regards, 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 5A66) 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: Paul Guillebeau
State: GA
Date Requested: Oct 26, 2005
Not Important/Relevant to my state(s)
Response:

Responder: Bob Bellinger
State: SC
Date Requested: Oct 27, 2005
Not Important/Relevant to my state(s)
Response:

Responder: Mark Mossler
State: FL
Date Requested: Nov 02, 2005
Response: I have checked with several other individuals and no one is aware of any current use of Malathion in Florida citrus. Past use has been in conjunction with eradication programs. I agree with the statement below that the 0.175 lb rate is for use with baits whereas the higher rate is spray application. If you need more information, you might try contacting someone with FDACS who has worked with the Fruit Fly eradication program. Michael E. Rogers IFAS / Citrus Research and Education Center 700 Experiment Station Road Lake Alfred, FL 33850 phone: 863-956-1151 Fax: 863-956-4631 mobile: 863-661-3303 Email: mrogers@crec.ifas.ufl.edu

Responder: Charles Luper
State: OK
Date Requested: Nov 03, 2005
Not Important/Relevant to my state(s)
Response: No citrus in OK.

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