In order to control the mound-building termite Cornitermes cumulans, considered as the most important termite in natural pastures in the State of São Paulo, Brazil, an experimental field test with chemical insecticides was carried out. The test consisted of 8 treatments with 10 replications each: A1 and A2 chlorpyrifos (600 ml 22.4% EC); B1 and B2 chlorpyrifos (1000 ml 22.4% EC); C1 and C2 endosulfan (600 ml 35% EC); D1 and D2) endosulfan (1000 ml 35% EC). Between parenthesis are the quantities of the trade mark "Dursban" (chlorpyrifos) and "Thiodan" (endosulfan) in 100 liters of water (one liter of water per mound). In the treatments A1, B1, C1 and D1, evaluations were made 120 days after the product application, and in A2, B2, C2 and D2, after 253 days. There was no significant difference among treatments: all were efficient.
mound-building termite; natural pastures; chemical control