Autor(es): Lija-Escaline Jalasteen; Senthil-Nathan Sengottayan; Thanigaivel Annamalai; Pradeepa Venkatraman; Vasantha-Srinivasan Prabhakaran; Ponsankar Athirstam; Edwin Edward Sam; Selin-Rani Selvaraj; Abdel-Megeed Ahmed

Resumo: The leaves of Piper nigrum L. (Piperaceae) were evaluated for chemical constituents and mosquito larvicidal activity against the larvae of Aedes aegypti. GC and GC-MS analyses revealed that the crude extracts contain 16 compounds. Thymol (20.77%) and ç-elemene (10.42%) were identified as the major constituents followed by cyclohexene, 4-ethenyl-4-methyl-3-(1-methylethenyl)-1-(1 methylethyl)-, (3R-trans) (7.58%), 4,6-octadienoic acid, 2-acetyl-2-methyl-, ethyl ester (6.98), 2(3H)-furanone, 3,4-bis(1,3-benzodioxol-5-ylmethyl) dihydro-, (3R-trans) (6.95%), 1-naphthalenol, 1,2,3,4,4a,7,8,8a-octahydro-1,6-dimethyl-4-(1-methylethyl)-, [1R-(1à,4á,4aá,8aá)]-(Cedreanol) (5.30%), trans-2-undecen-1-ol (4.48%), phytol (4.22%), 1,6-cyclodecadiene, 1-methyl-5-methylene-8-(1-methylethyl)-,[s-(E,E)] (3.78%) and 2,6-dimethyl-3,5,7-octatriene-2-ol, Z,Z (2.39%). Larval mortality was observed after 3 h of exposure period. The crude extract showed remarkable larvicidal activity against Ae. aegypti (LC50 = 34.97). The larvae of Ae. aegypti exposed to the P. nigrum, significantly reduced the activities of ?- and ?-carboxylesterases and superdioxide. Further, P. nigrum extract was severely affecting the mosquito gut cellular organelles. Based on the results, the chemical constituents of crude extracts of P. nigrum can be considered as a new source of larvicide for the control of Ae. aegypti.

Palavras-Chave: Dengue vector; Black pepper; GC-MS; Superoxide; Carboxylesterase; Larvicide; Histopathology

Imprenta: Parasitology Research, v. 114, n. 11, p. 4239-4249, 2015

Identificador do objeto digital: 10.1007/s00436-015-4662-1

Descritores: Aedes aegypti - Larvicide ; Aedes aegypti - Dengue

Data de publicação: 2015

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