Larvicidal and repellent actions of Dalbergia sissoo Roxb. (F. Leguminosae) oil against mosquitoes

Studies were carried out to evaluate the larvicidal, growth inhibitor and repellent actions of D. sissoo oil against Anopheles stephensi, Aedes aegypti and Culex quinquefasciatus under laboratory conditions. Pure oil was applied at 0.4–5 ml/m 2 on a water surface. This showed that larvicidal activit...

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Bibliographic Details
Published in:Bioresource technology 2000-07, Vol.73 (3), p.207-211
Main Authors: Ansari, M.A, Razdan, R.K, Tandon, Mamta, Vasudevan, Padma
Format: Article
Language:English
Subjects:
Aedesaegypti
Anophelesstephensi
Culexquinquefasciatus
Dalbergiasissoo oil
Extraction
Insecticides
Mosquitoes
Oils and fats
Plants (botany)
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Summary:Studies were carried out to evaluate the larvicidal, growth inhibitor and repellent actions of D. sissoo oil against Anopheles stephensi, Aedes aegypti and Culex quinquefasciatus under laboratory conditions. Pure oil was applied at 0.4–5 ml/m 2 on a water surface. This showed that larvicidal activity was directly proportional to dosages. One hundred percent mortality of Cx. quinquefasciatus immatures was observed within 24 h at 4 ml/m 2, followed by Ae. aegypti (90%) and An. stephensi (60%), and pupation was totally inhibited. Adults which emerged from exposure to a sublethal dosage (2 ml/m 2) either did not lay eggs ( Ae. aegypti) or hatch ( Cx. quinquefasciatus and An. stephensi). The oil also showed strong repellent action when 1 ml oil was applied on exposed parts of human volunteers. They were protected from mosquito bites for 8–11 h. The protection (91.6±2%) obtained with sissoo oil was comparable to that with commercial Mylol oil (93.8±1.2%) consisting of di-butyl and dimethyl phthalates.
ISSN:0960-8524
1873-2976
DOI:10.1016/S0960-8524(99)00180-7