Abstract
Pesticide susceptibility tests against preparasitic (infective stage) Romanomermis culicivorax Ross and Smith (= Reesimermis nielseni Tsai and Grundmann, auct., partim.) indicated that 24-h exposure to abate (0.001 ppm), malathion (0.100 ppm), baytex (0.003 ppm), dursban (0.001 ppm), Dimilin® (0.005 ppm), and Altosid® (0.005 ppm) produced no apparent detrimental effects to the viability and infectivity of R. culicivorax preparasites, or to the viability of the resulting postparasites. However, concn of 0.0035 and 0.004 ppm baytex, and 0.004 ppm dursban resulted in significantly lower preparasite infectivity when compared to controls, even though acute mortality of preparasites was not evident at these concentrations.
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