Mosquito larvicidal activity of polyacetylenes from species in the Asteraceae

Twenty-four polyacetylenes isolated from species in the Asteraceae were screened for their near-UV-mediated larvicidal properties to the mosquito, Aedes aegypti. Dosage resonse lines for three of the most active compounds were prepared. One of these, σ-terthienyl from Tagetes was more toxic than DDT...

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Bibliographic Details
Published in:Biochemical systematics and ecology 1981-01, Vol.9 (1), p.63-68
Main Authors: Arnason, T., Swain, T., Wat, C.-K., Graham, E.A., Partington, S., Towers, G.H.N., Lam, J.
Format: Article
Language:English
Subjects:
Aedes aegypti
animal breeding
animal genetics
arthropods
Asteraceae
entomology
larvicides
mosquito
phototoxicity
polyacetylenes
UV radiation
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Summary:Twenty-four polyacetylenes isolated from species in the Asteraceae were screened for their near-UV-mediated larvicidal properties to the mosquito, Aedes aegypti. Dosage resonse lines for three of the most active compounds were prepared. One of these, σ-terthienyl from Tagetes was more toxic than DDT when near-UV radiation was provided. A scaled up trial with this compound in a simulated field situation demonstrated its potential as a larvicide. The effects of the radiation dose on larval survival were studied and the action spectra for the phototoxic effects of three compounds on larvae were obtained with narrowband interference filters. Because of the close agreement between the action and absorption spectra, it appears most probable that the polyacetylene is the primary absorbing compound. The potential of polyacetylenes as larvicides and their role in plant herbivore relations are discussed.
ISSN:0305-1978
1873-2925
DOI:10.1016/0305-1978(81)90061-2