International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 3
First page : (912) Last page : (921)
Article doi: http://dx.doi.org/10.18782/2320-7051.2595
Insecticidal Activity of Curcuma longa Essential Oil and its Fractions against Sitophilus oryzae L. and Rhyzopertha dominica F. (Coleoptera)
Pooja Gangwar* and S. N. Tiwari
Department of Entomology, College of Agriculture, G.B.P.U.A. & T, Pantnagar, District U.S. Nagar, Uttarakhand 263145, India
*Corresponding Author E-mail: poojagangwar64@gmail.com
Received: 14.02.2017 | Revised: 25.02.2017 | Accepted: 26.02.2017
ABSTRACT
The essential oil of Curcuma longa L. distilled from its leaves was fractionated by column chromatography and tested in the laboratory for volatile toxicity against stored grain pests Sitophilus oryzae L.( Rice weevil) and Rhyzopertha dominica F. (lesser grain borer). The oil and its fractions were insecticidal in fumigant toxicity assay. The adults of R. dominica were most susceptible to fumigant action of all fractions of C. longa leaf oil at 0.1% and 0.05% concentration, while in case of S. oryzae, pure C. longa oil and its I-fraction at 0.1% concentration were found most effective. The C. longa oil and its fractions were analyzed by GC–MS, which contained terpinolene, α- phellandrene, limonene, myrcene and eucalyptol as the major compounds, while α-pinene, β-pinene, and linalool regarded as minor compounds. These compounds (purchased from Sigma & Aldrich) were also investigated for fumigant action against R. dominica and S. oryzae. Fractions with terpinolene, α-phellandrene, limonene and eucalyptol as major constituents were found highly effective against these storage insects and fractions which consist of all theses constituents together were also found effective. The fractions of essential oil which consists of more constituents, whether it was a major or a minor, was found often more toxic than any fraction with less constituents.
Key words: Curcuma, Rhizopertha, Sitophilus, Monoterpenes, Fumigant, Leaf oil.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Gangwar, P. and Tiwari, S.N., Insecticidal Activity of Curcuma longa Essential Oil and its Fractions against Sitophilus oryzae L. and Rhyzopertha dominica F. (Coleoptera), Int. J. Pure App. Biosci.5(3): 912-921 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2595
