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Ocimum tenuiflorum oil, a potential insecticide against rice weevil with antiacetylcholinesterase activity.

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Relation http://ir.cftri.com/13902/
https:// doi.org/10.1016/j.indcrop.2018.10.043
 
Title Ocimum tenuiflorum oil, a potential insecticide against rice weevil with antiacetylcholinesterase
activity.
 
Creator Bhavya, M. L.
Chandu, A. G. S.
Sumithra Devi, S.
 
Subject 10 Plants
26 Pesticide Chemistry
21 Cereals
 
Description Essential oils are complex secondary metabolites, rich in volatiles, possessing a wide range of biological activities.
In recent years, its application as bio-pesticide is receiving renewed attention due to its effective and safe
application. In the present study, holy basil (Ocimum tenuiflorum) essential oil was tested for its insecticidal
activity against Sitophilus orzyae (L.), using direct contact application and fumigation procedures. The GC–MS
analysis of the O. tenuiflorum essential oil was also performed to characterize the essential oil. The GC–MS results
showed that the major components present in O. tenuiflorum oil were eugenol and caryophyllene constituting
about 70.5% of the total essential oil composition. Fumigant toxicity of essential oil and eugenol standard was
assessed at different rates (100-1000 μL/L air) in space fumigation study. Toxicity results revealed that fumigant
and contact toxicity of the oils was significantly (p < 0.05) influenced by concentration and exposure time. In
contact toxicity assay, O. tenuiflorum essential oil showed the LC50 value of 0.376 μL/cm2 and maximum mortality
at 0.786 μL/cm2 concentration after 24 h exposure. In fumigant toxicity assay, O. tenuiflorum essential oil
and eugenol showed the LC50 value of 963.3 and 1070.6 μL/L, respectively at 6 h exposure. The O. tenuiflorum
essential oil and eugenol was also evaluated for acetylcholinesterase activity in-vivo and was found to affect the
acetylcholinesterase activity. The O. tenuiflorum essential oil exhibited insecticidal activity via inhibiting acetylcholinesterase
activity and thus can be explored for its application as a possible botanical insecticide.
 
Date 2018
 
Type Article
PeerReviewed
 
Format pdf
 
Language en
 
Identifier http://ir.cftri.com/13902/1/Industrial%20Crops%20%26%20Products%20126%20%282018%29%20434%E2%80%93439.pdf
Bhavya, M. L. and Chandu, A. G. S. and Sumithra Devi, S. (2018) Ocimum tenuiflorum oil, a potential insecticide against rice weevil with antiacetylcholinesterase activity. Industrial Crops and Products, 126. pp. 434-439.