Effects of the inorganic salts, copper sulphate, sodium fluoride and borax were studied against nymphs of the dry-wood termite Crypto­termes brevis Walker. After 2 days of treatment, mortalities were 8.33, 6.67 and 0.00% at 0.5% copper sulphate, sodium fluoride and borax, re­spectively. The corresponding figures were 68.89, 43.33 and 26.67, re­spectively with the highest concentration (5%). The longest period of exposure (28 days) induced 83.33, 100 and 72.22% mortality at 0.5% concentration of the tested compounds, respectively.