Open AccessSpatial and temporal distribution of mosquito larvicidal compounds in mangroves
Author(s) -
Muhammad Ali,
S. Ravikumar,
J Margaret Beula
Publication year - 2012
Publication title -
asian pacific journal of tropical disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 33
ISSN - 2222-1808
DOI - 10.1016/s2222-1808(12)60087-5
Subject(s) - avicennia marina , aedes aegypti , mangrove , biology , instar , biopesticide , distilled water , bark (sound) , botany , bruguiera , traditional medicine , larva , horticulture , chemistry , pesticide , ecology , medicine , chromatography
Objective: To identify the larvicidal activity of the mangrove plant extracts. Methods: Parts\ud(bark, root, leaf and flower) of mangrove plants, Avicennia marina (A. marina), Acanthus ilicifolius,\udBruguiera cylindrica and Excoecaria agallocha (E. agallocha), were dissolved in DMSO to prepare\uda graded series of concentration. Batches of 25 early 4th instars larvae of Aedes aegypti (Ae. aegypti)\udwere transferred to a 250 mL enamel bowl containing 199 mL of distilled water and 1 mL of plant\udextracts (0.01-0.10 mg). Each experiment was conducted with three replicates and a concurrent control\udgroup. A control group consisted of 1 mL of DMSO and 199 mL of distilled water only. After 24 h, the\udpercentage of mortality was determined. Results: The bark extract of A. marina showed maximum\udlarvicidal activity against the 4th instars larvae of Ae. aegypti, followed by the leaf extract of E.\udagallocha. The presence of flavonoids, terpinoids and sponins in the ethanolic extracts of A. marina\udmight be responsible for the larvicidal activity. Conclusions: It is concluded from the present study\udthat the mosquitocidal toxins of A. marina might be a prospective alternative in mosquito control\udprogramme involving mangrove biopesticides