Five different insecticides were applied into the mounds of a termite C. cumulans. Fifty mounds were measured, divided in 5 groups (10 nests each) and had pesticide applied. Insecticides were introduced into the center of the nests through a 50-60 cm long canal made from the top to the nucleus with a steel bar. The treatments were as follows: A) 5% granular aldoxicarb (1g); B) 10% EC biphenthrin (0.2g); C) 50% EC profenophos (1g); D) 0.45% granular dodecachlor (0,18g); E)50% EC fenthion (1g). The quantities between parenthesis are of active ingredients introduced per nest. Five months after the application mounds were completely opened. The mortality was: A) 40%; B) 70%; C) 80%; D) 100%; E) 100%.