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Insecticide resistance in Brazilian Triatoma infestans and Venezuelan Rhodnius prolixus
Author(s) -
Vassena C. V.,
Picollo M. I.,
Zerba E. N.
Publication year - 2000
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 - 10.1046/j.1365-2915.2000.00203.x
Subject(s) - rhodnius prolixus , triatoma infestans , reduviidae , deltamethrin , piperonyl butoxide , biology , rhodnius , triatominae , hemiptera , cypermethrin , triatoma , toxicology , trypanosoma cruzi , botany , ecology , pesticide , insect , parasite hosting , world wide web , computer science
Summary Resistance levels to insecticides used in control of Chagas Disease vectors were assessed in two species of bugs (Hemiptera: Reduviidae): Triatoma infestans (Klug) from Brazil and Rhodnius prolixus Stål from Venezuela. The resistance ratios, compared to susceptible laboratory strains, were determined by topical application bioassays. The T. infestans PA strain exhibited resistance ratios of 7× to deltamethrin, 3.6× to β‐cyfluthrin and 3.3× to cypermethrin, but was susceptible to β‐cypermethrin and lambda‐cyhalothrin. Rhodnius prolixus CA strain showed resistance to all the pyrethroids evaluated, the resistance ratios ranging between 4.5× to lambda‐cyhalothrin and 12.4× to cypermethrin. Deltamethrin resistance in both strains was decreased by piperonyl butoxide, suggesting oxidative metabolism as cause of resistance.