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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 100, No. 1, 2005, pp. 59-61
Bioline Code: oc05012
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 100, No. 1, 2005, pp. 59-61

 en Biological effect of 1-dodecanol in teneral and post-teneral Rhodnius prolixus check for this species in other resources and Triatoma infestans check for this species in other resources (Hemiptera: Reduviidae)
Gastón Mougabure Cueto; Eduardo Zerba & María Inés Picollo

Abstract

Topical application of 1-dodecanol was significantly more toxic against teneral first nymphs (1-3 h old) than post-teneral first nymphs (24 h old). The lethal dose ratios were 711,500 for Rhodnius prolixus check for this species in other resources and 3613 for Triatoma infestans check for this species in other resources . No significative difference between LD50 was found when 1-dodecanol was injected in recently hatched adult R. prolixus (1-4 h old) nor in older adults (24 h old). These values were similar to those calculated for deltamethrin (an effective triatomicide), showing that 1-dodecanol had no insecticidal properties when it was applied by injection. Topical application of high dose of 1-dodecanol (1 μg/i) on teneral first nymphs of R. prolixus, produced an interruption of the darkening process of the cuticle, and probably in the development of its physiological properties.

Keywords
Triatoma infestans - Rhodnius prolixus - dodecanol - cuticle

 
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