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Synergism of chlorpyrifos against the German cockroach, Blattella germanica
Author(s) -
DONG K.,
SCOTT J. G.
Publication year - 1992
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1111/j.1365-2915.1992.tb00612.x
Subject(s) - german cockroach , chlorpyrifos , cockroach , biology , toxicology , strain (injury) , pesticide , ecology , anatomy
. Of fifteen compounds tested as synergists for chlorpyrifos against susceptible and resistant strains of Blattella germanica , the German cockroach, eleven were active against the resistant strain but only seven were synergistic against the susceptible strain. Overall, the most effective synergist was S,S,S‐tributyl phosphorotrithioate (DEF) followed by phenyl saligenin cyclic phos‐phonate (PSCP) and two substituted N,7V‐dimethylcarbamates: SK‐102 and SK‐37. The most effective synergist for overcoming chlorpyrifos resistance was SK‐37 which reduced the resistance ratio by 3.2‐fold. Four other synergists which reduced chlorpyrifos resistance, in order of their effectiveness, were: SK‐102 > PSCP > DEF > tridiphane. The potential usefulness of these synergists for German cockroach control is discussed.