Effects of juvenile hormone analogue on ecdysis prevention induced by precocene in Rhodnius prolixus (Hemiptera: Reduviidae)

Furtado, André Freire; Garcia, Elói S.

doi:10.1590/s0074-02761984000400004

Cited by 4 publications

(1 citation statement)

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“…Insect growth regulators (Pinchin et al, 1978) and precocenes (Oliveira Filho, 1980;Oliveira Filho et al, 1981;Azambuja et al, 1984) have also been tested as alternatives in triatomine control.…”

Section: Introductionmentioning

confidence: 99%

A screening method for natural products on triatomine bugs

Schmeda-Hirschmann

Arias

1992

Phytotherapy Research

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A simple method for screening natural products on triatomine bugs, vectors of Chagas' disease, was developed using fourth instar Rhodnius neglectus nymphs as an insect model. The statistical method of randomized blocks and randomized blocks with a dichotomous variable were compared and the minimum sample size for screening purposes was established. Tests were made on 94 plant extracts from 49 species, 28 of which are traditionally regarded as having some effect on arthropods or parasitic helminths. 50 pg of crude hexane or ethanol extract was topically applied to each insect. The effect on mortality and moulting was assessed. Ten plant species caused an increased mortality (16.0% to 52.3%) compared with untreated controls. Moulting inhibition ranged from 22.2% to 33.3% and was related to insecticidal effect in most cases. Extracts from two Meliaceae plants belonging to the genera Melia and Cabralea were among the most active tested, causing 32.5% and 45% mortality, respectively. Extracts from a Saluia species killed 52.3% of the bugs. Ten of the 13 plants showing activity are used by the rural population in various parts of Latin America for arthropod control or as vermifuges.

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Section: Introductionmentioning

confidence: 99%