The contact toxicity of the basil and orange essential oils and their
components against S. zeamais and T. castaneum adults was evaluated
using a topical application test. Dilutions of the tested materials (0.01–
0.4 mg adult−1) were prepared in ethyl alcohol and 0.5 μl of aliquots
were applied topically to the dorsal surface of the adults using a topical
applicator