The repellency assay used is a modification of the technique developed by Azima. Extracts at different concentrations (10 % , 5 % , 2.5 % , 1 % , 0.1 % , and 0.01 % ) were evaluated.
All extracts except that from ginger had similar repellencies ranging between 80 % -96 % at 10 % concentration. At the lowest concentration (0.01 % ), onion extract gave the highest repellency (30 % ) followed by clove and cinnamon (23 % ).
Generally, the plant extracts showed various degrees of repellency against the larval mites and the repellency increased with increasing concentrations of the extracts.