Circadian organization of locomotion activity in the haematophagous bug Triatoma infestans

Lazzari, Cláudio R.

doi:10.1016/0022-1910(92)90101-i

Cited by 124 publications

(120 citation statements)

References 21 publications

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“…On the other side, only a discrete molt inhibition without alteration of intermoulting period was induced by the topical treatment. Therefore, both molt inhibition and transitory paralysis triggered by topical and feeding treatments are related not only to toxicity but, probably also due interference of Pilocarpus compounds on the triatomine neuroendocrine system, once ecdysis and insect movement are under neurological control (Wigglesworth, 1934a(Wigglesworth, ,b, 1972Lazzari, 1992;TakanoLee;Edman, 2001). Unfortunately, despite many essential oils have been extracted and analyzed, and a number of components identifi ed, little is know about their useful biological activities (Lahiou, 2004).…”

Section: Discussionmentioning

confidence: 99%

Effects of the essential oil obtained from Pilocarpus spicatus Saint-Hilaire (Rutaceae) on the development of Rhodnius prolixus nymphae

Mello¹,

Uzeda²,

Bernardino³

et al. 2007

Rev. bras. farmacogn.

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RESUMO: "Efeitos do óleo essencial de Pilocarpus spicatus Saint-Hilaire (Rutaceae) no desenvolvimento de ninfas de Rhodnius prolixus". Bioensaios contra ninfas de 5º estádio de Rhodnius prolixus foram conduzidos utilizando-se óleo essencial de Pilocarpus spicatus extraído por hidrodestilação. Os principais resultados podem ser resumidos como se segue: (i) altos níveis de toxicidade e paralisia associados à discreta inibição da muda foram induzidos pela aplicação tópica de 0,5 μL ou 1,0 μL do óleo essencial por inseto; (ii) fagoinibição parcial, altos níveis de inibição da muda, período intermuda prolongado e alto número de insetos paralisados mas ausência de toxicidade foram observados após tratamento oral com 5,0 μL ou 10 μL de óleo essencial de P. spicatus por mL de sangue ingerido. A importância destes resultados em relação a eventos biológicos relevantes em R. prolixus é aqui discutida. Unitermos: Rhodnius prolixus, Pilocarpus spicatus, óleo essencial.ABSTRACT: Bioassays against fi fth-instar nymphae of Rhodnius prolixus were conducted with essential oil of Pilocarpus spicatus extracted by hydrodistillation. The main results may be summarized as follows: (i) high levels of toxicity and paralysis together with discrete moulting inhibition were caused by topical application of either 0.5 μL or 1.0 μL per insect of the crude essential oil; (ii) partial fagoinhibition, high moulting inhibition, prolonged intermoulting period and high number of paralyzed insects, but no toxicity were observed after oral treatment using either 5 μL or 10 μL of Pilocarpus spilcatus essential oil per mL of ingested blood meal. The importance of these results in relation to the relevant biological events in R. prolixus is herein discussed.

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Section: Discussionmentioning

confidence: 99%

Effects of the essential oil obtained from Pilocarpus spicatus Saint-Hilaire (Rutaceae) on the development of Rhodnius prolixus nymphae

Mello¹,

Uzeda²,

Bernardino³

et al. 2007

Rev. bras. farmacogn.

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“…Ferreira et al 2007, Flores and Lazzari 1996, Guerenstein and Lazzari 2009, Lazzari and Núñez 1989a,b, Wigglesworth and Gillett 1934. The behavioural sensitivity of triatomines to heat is extremely high and they remain the only group of blood-sucking insects where the ability to perceive the infrared radiation emitted by the host body has been demonstrated (Lazzari andNúñez 1989a, Schmitz et al 2000).…”

Section: Olfactory Behaviour: Host-seekingmentioning

confidence: 99%

“…The akinesis behaviour is controlled and maintained by external cues, such as aggregation arresting pheromones and tactile stimulation by physical contact with the substrate and with conspecifics (thigmotaxis), in combination with an internal motivational state of inactivity, controlled by a circadian clock. During the early night, the internal circadian clock determines that one to two hours after dusk, when their hosts are resting, the bugs become active (Lazzari 1992), and leave their refuges searching for cues revealing the presence of a potential host to feed on.…”

mentioning

confidence: 99%

Olfaction in vector-host interactions

Takken¹,

Knols²

2010

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“…The circadian rhythm of spontaneous activity of T. infestans is split in two main endogenously controlled components, one burst of activity at dusk and a second one at dawn (Lazzari 1992). As shown by these activity periods are related to the search for food and for refuge, respectively.…”

Section: Discussionmentioning

confidence: 99%