Bioactivity of Some Plant Extracts Against Termite Odontotermes obesus (Rambur) (Blattodea: Termitidae)

摘要

A study was carried out to determine the chemical constituents of wood extractives from Ashoka, Saraca asoca (Roxb) and Magnolia (Magnolia grandiflora L.) (Southern Magnolia) against Odontotermes Obesus (Rambur) under laboratory conditions in Forman Christian College University (Lahore, Pakistan) in June 2016. Extraction was done by soxhlet apparatus. The analysis of these compounds was performed by Gas Chromatography-Mass Spectrometry (GC-MS). Gas Chromatography-Mass Spectrometry of wood extractives of Saraca asoca detected 4-[(1E)-3-Hydroxy-1-propenyl]-2-methoxyphenol; Hexdecanoic acid, methyl ester; n-Hexadecanoic acid; 5,6-Dimethoxy phthalaldehydic acid; 9,12-Octadecadienoic acid, methyl ester, (E,E)-; 9,12-Octadecadienoic acid (Z,Z)-; Oleic acid; Octadecanoic acid; 1,2-Benzenedicarboxylic acid, mono(2-ethylhexyl) ester. Compounds in wood extractives of Magnolia grandiflora were Cyclopentane carboxylic acid, 2-methyl-4-(phenylmethylene)-, methyl ester; 4-((1E)-3-Hydroxy-1-propenyl)-2- methoxyphenol; n -Hexadecanoic acid; 5,6-Dimethoxy phthalaldehydic acid; 7-(1,3-Dimethylbuta-1,3- dienyl)-1,6,6-trimethyl-3, 8-dioxatricyclo[5.1.0.0(2,4)]; 9,12-Octadecadienoic acid, methyl ester, (E,E)-; Oleic acid; 16-Methyloxacyclohexadeca-3,5-dien-2-one; Germacra-1(10), 4,11(13)-trein-12-oic acid, 6.alpha.- hydroxy-gamma-lactone, (E,E);5,6-Azulenedicarboxaldehyde,1,2,3,3a,8,8a-hexahydro-2,2,8-trimethyl-, (3a.alpha.,8.alpha.,8a.alpha)-(-)-; Aromadendrene oxide-(2); Cedran-diol, 8S, 14-; Cis-Z-.alpha.-Bisabolene epoxide; 2-Dodecen-1-yl(-)succinic anhydride; 3-Buen-2-ol, 2-methyl-4(1,3,3-trimethyl-7- oxabicyclo[4.1.0]hept-2-yl)-.Based on the feeding activity, wood extracts were arranged in descending order of preference; Ashoka > Magnolia. So these could prove useful in developing a soil barrier to block termite activity and serve as a replacement to synthetic chemicals.