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Insecticide resistance status and mechanisms in Malaysian Blattella germanica (Linnaeus).
Southeast Asian J Trop Med Public Health ; 1997 Mar; 28(1): 212-7
Article in English | IMSEAR | ID: sea-36351
ABSTRACT
The insecticide resistance status of 4 strains of adult male Blattella germanica, viz M (Malacca), E (England), F (restaurant) and K (cafeteria) against malathion and bendiocarb compared with a reference susceptible strain (S) was determined by using a modified WHO bioassay method. The results indicated that all the 4 strains were resistant to the insecticides albeit in different degrees. Resistance ratios for malathion ranged from 1.85-41.07-fold, whereas that of bendiocarb ranged from 1.68-4.83-fold. The biochemical microplate enzyme assays technique employed indicated that the resistance in M and E strains were attributed to acetylcholinesterase insensitivity. Multiple resistance was not detected in any of the 4 strains. Parameters of the identified resistance mechanism correlated well with the observed level of resistance. Agar gel electrophoresis showed that variations in esterase isoenzymes did not confer organophosphate and carbamate resistance to the 4 strains.
Subject(s)
Full text: Available Index: IMSEAR (South-East Asia) Main subject: Species Specificity / Male / Insecticide Resistance / Carbamates / Cockroaches / Phenylcarbamates / Developing Countries / Dose-Response Relationship, Drug / Insecticides / Animals Country/Region as subject: Asia Language: English Journal: Southeast Asian J Trop Med Public Health Year: 1997 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Main subject: Species Specificity / Male / Insecticide Resistance / Carbamates / Cockroaches / Phenylcarbamates / Developing Countries / Dose-Response Relationship, Drug / Insecticides / Animals Country/Region as subject: Asia Language: English Journal: Southeast Asian J Trop Med Public Health Year: 1997 Type: Article