Publication Type

Journal Article

Journal Name

Industrial Crops and Products

Publication Date

4-1-2013

Abstract

Essential oils from leaves and berries of Solanum sarrachoides were obtained by hydro-distillation, analyzed by GC-MS and tested for oviposition deterrence against Tetranychus evansi. Plant oils comprised mainly of monoterpenes and fatty acids, but differed in terms of their relative abundance. The leaf oil contained mainly camphor (34.1%), limonene (8%), decanoic acid (9.3%) and hexadecanoic acid (7.3%). The berry oil contained mainly fatty acids (>20%) including hexadecanoic acid (9.8%) and dodecanoic acid (5.9%), hydrocarbons (>10%) and (E)-β-linalool (3.1%). In oviposition deterrence assays, the leaf essential oil and individual major monoterpenes compared favorably with the two positive controls, neem oil and cinnamaldehyde at varying concentrations [incidence ratio (IR)<1]. Compared to the fatty acid blend, the monoterpene blend exhibited strong oviposition deterrence (IR. <1) across all concentrations. Our results show that essential oils of S. sarrachoides and their monoterpene constituents play a role in regulating oviposition in T.evansi. © 2013 Elsevier B.V.

Keywords

African nightshade, Oviposition deterrence, Plant essential oils, Tetranychus evansi

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