01462nas a2200145 4500008004100000245014500041210006900186300001200255490000600267520095300273653001201226100002001238700001901258856003901277 1980 eng d00aFeeding Inhibition in Black Fly Larvae (Diptera: Simuliidae) and Its Effects on the Pathogenicity of Bacillus thuringiensis var. israelensis0 aFeeding Inhibition in Black Fly Larvae Diptera Simuliidae and It a704-7080 v93 a

The normal feeding behavior of Simulium vittatum larvae was disrupted following exposure to high concentrations of suspended particles under simulated stream conditions. Virtually all particulates tested caused inhibition of feeding at a concentration of 50 mg/liter, indicating that inhibition is a nonspecific response. The percentage of larvae with inhibited feeding increased with increasing particle concentration. Our results indicate that inhibition was a consequence of rapid gut filling.

The pathogenicity of Bacillus thuringiensis var. israelensis against S. vittatum was diminished or enhanced depending on whether feeding inhibition was induced before or after bacterial exposure. These results were attributed to reduced rates of bacterial ingestion and voidance, respectively. Such effects may have important implications in laboratory bioassays and field control.

10abiology1 aGaugler, R., R.1 aMolloy, D., P. uhttps://doi.org/10.1093/ee/9.5.704