1.Larvicidal activity of few select indigenous plants of North East India against disease vector mosquitoes (Diptera: Culicidae)
Dohutia, C ; Bhattacharyya, D.R ; Sharma, S.K ; Mohapatra, P.K ; Bhattacharjee, K ; Gogoi, K ; Gogoi, P ; Mahanta, J ; Prakash, A.
Tropical Biomedicine 2015;32(1):17-23
Mosquitoes are the vectors of several life threatening diseases like dengue, malaria,
Japanese encephalitis and lymphatic filariasis, which are widely present in the north-eastern
states of India. Investigations on five local plants of north-east India, selected on the basis of
their use by indigenous communities as fish poison, were carried out to study their mosquito
larvicidal potential against Anopheles stephensi (malaria vector), Stegomyia aegypti (dengue
vector) and Culex quinquefasciatus (lymphatic filariasis vector) mosquitoes. Crude Petroleum
ether extracts of the roots of three plants viz. Derris elliptica, Linostoma decandrum and
Croton tiglium were found to have remarkable larvicidal activity; D. elliptica extract was
the most effective and with LC50 value of 0.307 μg/ml its activity was superior to propoxur,
the standard synthetic larvicide. Half-life of larvicidal activity of D. elliptica and L. decandrum
extracts ranged from 2-4 days.
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