Chemicals

Methyl benzoate, Tween 20, Tween 80, ethyl benzoate, vinyl benzoate, n-propyl benzoate, n-butyl benzoate, benzyl benzoate, methyl 2-methylbenzoate, methyl 2-chlorobenzoate, methyl 2-methoxybenzoate, and methyl 2-nitrobenzoate were purchased from Sigma-Aldrich (St. Louis, MO). Compounds, iso-butyl benzoate, n-pentyl benzoate, and n-hexyl benzoate were purchased from Alfa Aesar (Tewksbury, MA). Methyl 3-methoxybenzoate (methyl m-anisate) and methyl 3-methylbenazoate (methyl m-toluate) were purchased from TCI America (Portland, OR). Acetone was used as solvent and purchased from Sigma-Aldrich (St. Louis, MO). All chemicals were used without further purification. Commercial pesticides: Distance insect growth regulator was purchased from Valent (Walnut Creek, CA), and TriStar 8.5 SL insecticide was purchased from Cleary Chemical (Alsip, IL). The active ingredients and corresponding concentrations for above commercial pesticides are listed in Table 3.