Wood as source of natural larvicides against Aedes aegypti (Diptera: Culicidae)
Numerous substances synthesized by the tree are present in the wood as defensives for environmental interactions. Such substances can be a potential source of active principles, including those of larvicidal action against Aedes aegypti mosquito. From literature review, 23 scientific papers on the larvicidal activity of compounds present in wood were found. The studies included the analysis of 66 plant species belonging to 23 botanical families. About 30% of the studied species were considered to have active properties. The most active sample was obtained by Callitris glaucophylla whose essential oil displayed CL50 = 0.69 ppm. Twenty-three potentially active molecules were identified, with the best result obtained by tectoquinone isolated from the methanol extract of the specie Cryptomeria japonica, with LC50 = 3.3 ppm. We observed that wood can be a source of natural larvicides with similar action to the synthetic organophosphorus temephos, whose CL50 value founded in literature ranged from 2.3 to 9.4 ppm. Among the advantages of using natural larvicides, it is highlighted the higher biodegradability and lower toxicity to non-target organisms when compared to synthetic ones, besides the contribution to face the problem of insect resistance.
| Main Authors: | , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
Embrapa Florestas
2023
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| Online Access: | https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/2174 |
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| Summary: | Numerous substances synthesized by the tree are present in the wood as defensives for environmental interactions. Such substances can be a potential source of active principles, including those of larvicidal action against Aedes aegypti mosquito. From literature review, 23 scientific papers on the larvicidal activity of compounds present in wood were found. The studies included the analysis of 66 plant species belonging to 23 botanical families. About 30% of the studied species were considered to have active properties. The most active sample was obtained by Callitris glaucophylla whose essential oil displayed CL50 = 0.69 ppm. Twenty-three potentially active molecules were identified, with the best result obtained by tectoquinone isolated from the methanol extract of the specie Cryptomeria japonica, with LC50 = 3.3 ppm. We observed that wood can be a source of natural larvicides with similar action to the synthetic organophosphorus temephos, whose CL50 value founded in literature ranged from 2.3 to 9.4 ppm. Among the advantages of using natural larvicides, it is highlighted the higher biodegradability and lower toxicity to non-target organisms when compared to synthetic ones, besides the contribution to face the problem of insect resistance. |
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