Chemical composition and insecticidal activities of essential oils against diamondback moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae).
Five Himalayan plants namely, Acorus calamus, Cedrus deodara, Aegle marmelos, Tagetes minuta and Murraya koenigii were used for the extraction of essential oils through hydrodistillation and the major volatile constituents as identified by GC and GC-MS techniques were β-asarone (91.1%), β-himachalene (45.8%), limonene (59.5%), Z-ocimene (37.9%) and α-pinene (54.2%), respectively. Essential oils were tested for their insecticidal properties against larvae of diamondback moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae). Results showed that A. calamus was most toxic (LC50 = 0.29 mg mL(-1)) to P. xylostella followed by C. deodara (LC50 = 1.08 mg mL(-1)) and M. koenigii (LC50 = 1.93 mg mL(-1)) via residual toxicity bioassay. Per cent feeding deterrence index and growth inhibition was significantly higher in A. calamus (42.20 and 68.55, respectively) followed by C. deodara (35.41 and 52.47). In repellent activity studies, C. deodara showed high repellence (64.76%) followed by A. calamus (55.05%).
a Entomology Laboratory, Plant Health Management Division , CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
S G Eswara
SG
Reddy
a Entomology Laboratory, Plant Health Management Division , CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
Shudh
S
Kirti Dolma
b Natural Product Chemistry and Process Development Division , CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
Rajkesh
R
Koundal
b Natural Product Chemistry and Process Development Division , CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
Bikram
B
Singh
D029023:Acorus / Q000737:chemistry; D045471:Aegle / Q000737:chemistry; D000081248:Allylbenzene Derivatives; D000818:Animals; D000840:Anisoles; D000081008:Bicyclic Monoterpenes; D028203:Cedrus / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007306:Insecticides / Q000737:chemistry* / Q000494:pharmacology / Q000633:toxicity; D007814:Larva / Q000187:drug effects; D039821:Monoterpenes; D009036:Moths / Q000187:drug effects*; D032101:Murraya / Q000737:chemistry; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology; D010936:Plant Extracts / Q000737:chemistry; D012717:Sesquiterpenes; D031686:Tagetes / Q000737:chemistry
D000081248:Allylbenzene Derivatives; D000840:Anisoles; D000081008:Bicyclic Monoterpenes; D007306:Insecticides; D039821:Monoterpenes; D009822:Oils, Volatile; D010936:Plant Extracts; D012717:Sesquiterpenes; C012195:asarone; C412292:himachalene; C005451:alpha-pinene
Essential oils; antifeedant; chemical composition; repellence; residual toxicity