Essential oils from selected wooden species and their major components as repellents and oviposition deterrents of Callosobruchus chinensis (L.)

Essential oils (EOs) from different parts of some selected wooden plants (Illicium verum, Bursera delpechiana, Croton anisatum, Cinnamomum cassia and Aniba rosaeodora) and the major components, trans-anethole, transcinnamaldehyde, linalool and linalyl acetate, as well as the major component of Gaultheria fragrantissima, methyl salicylate were tested for adult repellence and oviposition deterrent effects on adzuki bean beetle (ABB), Callosobruchus chinensis L. in a Y-tube olfactometer assay and no choice assay, respectively. EOs of L verum and C. anisatum as well as their common major component, trans-anethole and the major component of G. fragrantissima, methyl salicylate were effective repellents and had high degree of oviposition deterrent activity without affecting the seed viability. Linalool, the major component of A. rosaeodora and B. delpechiana EOs exhibited male repellency in higher concentrations but was not effective oviposition deterrent. From this study, two EOs: I. verum and C. anisatum and two major components; trans-anethole and methyl salicylate could be selected for use against C. chinensis for safe storage of adzuki bean.