Field efficacy of permethrin and fenvalerate applied as sprays to cattle for control of Boophilus microplus (Canestrini) (Acari: Ixodidae) in the eradication program in Puerto Rico? |
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| Authors: | Glen I Garris Robert H Zimmerman |
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| Institution: | 1. United States Department of Agriculture , Tropical Tick Research Laboratory, Agricultural Research Service , P.O. Box 70, Mayaguez, PR, 00709, U.S.A;2. United States Department of Agriculture , Tropical Tick Research Laboratory, Agricultural Research Service , P.O. Box 70, Mayaguez, PR, 00709, U.S.A;3. Department of Crop Protection , University of Puerto Rico—Mayaguez Campus , Mayaguez, 00708, Puerto Rico;4. Land Between the Lakes Laboratory , Tennessee Valley Authority , Golden Pond, Kentucky, 42231, U.S.A |
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| Abstract: | Abstract Permethrin applied as a spray to cattle at 0.025% or 0.05% effectively controlled Boophilus microplus (Canestrini) by the third day post‐treatment, but only provided < 60% control within 1 day post‐treatment with both concentrations. Percentage control did not drop below 90% until day 28 for 0.025% and day 31 for 0.05% permethrin; percentage control did not fall below 92% for 0.025% fenvalerate until after day 24–25; and at 0.05%, fenvalerate provided 95% control until day 28. A multiple treatment (spray applied every 2 weeks) with permethrin (0.05%) provided greater than 96% control of B. microplus after the initial treatment and 100% control by day 56. We concluded that although both chemicals have potential in an eradication program, they are not satisfactory for use at a quarantine line because both acaricides provided less than 100% control within 1 day post‐treatment. |
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| Keywords: | Heteropsylla cubana entomogenous fungi leucaena |
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