INVESTIGADORES
VASSENA Claudia Viviana
artículos
Título:
Autosomal inheritance of deltamethrin resistance in field populations of Triatoma infestans (Heteroptera: Reduviidae) from Argentina
Autor/es:
MONICA D. GERMANO, CLAUDIA V. VASSENA AND MARIA I. PICOLLO
Revista:
PEST MANAGEMENT SCIENCE
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Año: 2010 vol. 66 p. 705 - 708
ISSN:
1526-498X
Resumen:
Triatoma infestans (Klug, 1834) is the major Chagas disease
vector in the Southern Cone area of South America, and its chemical
control is based on the use of pyrethroid insecticides. Resistance to
deltamethrin in Salta province, Argentina, has been detected in field
populations since 2002, causing the failure of vector control campaigns
in this disease endemic area. The inheritance of deltamethrin resistance
in T. infestans was evaluated through reciprocal crosses conducted
between resistant and susceptible insects.
RESULTS: The response of the reciprocally mated insects progeny to
deltamethrin was intermediate between the highly resistant and the
susceptible parent colonies. Lack of significant differences between the
LD50 and resistance ratios of the reciprocally mated insects indicated
no sex-linkage on this trait.
CONCLUSION: Bioassay results, in addition to dominance degree
calculations, suggest that the resistance to deltamethrin in T.
infestans is controlled by semi dominant, autosomaly inherited factors.