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MEASURING HYDRAMETHYLNON RESISTANCE IN THE GERMAN COCKROACH, BLATTELLA GERMANICA (L.)
In a field population (RHA, Roanoke VA, USA) of Blattella germanica a decline in the efficacy of hydramethlynon has been documented for eight years. In 1987 >85% reduction of apartment infestations was achieved 4 wk after application, in 1990 reduction declined to 73%, and in 1995 reduction declined...