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Effect of Solenostemma argel on oviposition, egg hatchability and viability of Culex pipiens L. larvae
Author(s) -
AlDoghairi Mohammed,
ElNadi Abdelrahman,
Elhag Eltayeb,
AlAyedh Hassan
Publication year - 2004
Publication title -
phytotherapy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.019
H-Index - 129
eISSN - 1099-1573
pISSN - 0951-418X
DOI - 10.1002/ptr.1432
Subject(s) - hatching , larva , biology , culex pipiens , botany , toxicology , zoology
Methanolic extracts of aerial parts of the medicinal plant Argel ( Solenostemma argel (Del.) Hayne), incorporated into rearing media of Culex pipiens L. showed effect on oviposition, egg hatchability and larval viability. Acute toxicity of S. argel extract was found to possess LC 50 of 0.037, 0.031, 0.009 and 0.007 ppm and the LC 95 was found 0.394, 0.293, 0.065 and 0.030 ppm, after 1, 2, 4 and 7 days against the larva of C. pipiens under laboratory conditions. The ovicidal effect of S. argel was relatively less pronounced, however, the 0.1% concentration reduced egg hatch by 33.7%. The mortality of the newly hatched larvae, reared from eggs in this media, reached 100% at concentrations as low as 0.025%, 2 days post hatching. Complete suppression of oviposition within the rst 2 days was observed, however its action was gradually lost thereafter. Bioactive effects were mainly attributed to the presence of a variety of bioactive organic substances mainly terpenes, pergenine glucosides, alkaloids and sterols. Copyright © 2004 John Wiley & Sons, Ltd.