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Assessing insecticide resistance and aversion to methomyl‐treated toxic baits in Musca domestica L (Diptera: Muscidae) populations in southern California
Author(s) -
Darbro Jonathan M,
Mullens Bradley A
Publication year - 2004
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.885
Subject(s) - muscidae , musca , biology , methomyl , toxicology , bioassay , veterinary medicine , population , sugar , pesticide , zoology , larva , food science , ecology , medicine , demography , sociology
Progeny of house flies ( Musca domestica L) from ten California poultry operations, three dairies and one horse‐riding facility were tested for methomyl‐ and muscalure‐treated bait resistance using up to three different assays: a topical assay, a no‐choice feeding assay and a choice feeding assay. LD 50 resistance factors from the topical assay, compared with a locally‐derived susceptible colony, ranged between 1 and 4. LC 50 resistance factors from the no‐choice feeding assay ranged mostly between 2 and 5, with one value of 18. Measurable LT 50 resistance ratios for female flies in the choice feeding assay ranged from 43 to 159; two populations had <10% mortality at 48 h and could not be measured. LT 50 resistance ratios for male flies in the choice feeding assay ranged from 26 to 96, and one population was too resistant to measure. A behavioral assay tested the feeding preference of male and female flies provided a dish of sugar and a dish of methomyl‐ and muscalure‐treated bait. Of eight strains tested, females from seven strains and males from six strains showed significant preference for sugar over bait. Behavioral factors appear to be important in the severe resistance of house flies to baits in California. Copyright © 2004 Society of Chemical Industry