Sixteen clones of sugarcane resistant to the sugarcane borer, D. saccharalis in Houma, Louisiana, USA, were introduced and tested in Brazil against the same insect species. The sixteen introduced germplasm were CP57-614, CP62-258, CP66-491, CP70-321, CP70-330, CP71-321, Tainan 2n = 96, US74-103, US76-9, US76-14, US76-15, US76-20, US76-22, US76-25, US76-26 e US76-34. These sixteen introductions plus 4 IAC clones, namely 'IAC50-134', 'IAC52-150', 'IAC71-1001' and 'IAC1006', were planted on September 26, 1979, in Ribeirão Preto, State of Sao Paulo, Brazil. The experimental design used was a complete randomized block with 20 treatments and 10 replications. Evaluation was made on September 9, 1980. Twenty culms per plot were split lenghtwise and the numbers of internodes bored and not bored were registered. The variation of infestation among the clones was highly correlated with the diameter of the plants. The least infested germplasm was Tainan 2n = 96 with a culm diameter of 1.03cm. The most infested, IAC52-150 had a diameter of 2.83cm. The infestation (percentage of culms infested) was linearly correlated with the diameter (r² = 0.91) and the intensity of infestation (percentage of internodes infested) was linearly correlated with the square of the diameter (r² = 0.82). These results show the possibility of the use of thinner less infested clones introduced from USA as source of resistance to the sugarcane borer in Brazilian breeding programs.