Effect of 90 MeV heavy-ion irradiation on the surface morphology, transport and magnetic properties of La0.9Pb0.1MnO3 (LPMO) single crystals has been reported. It was found that at low ion-fluence the metal-insulator transition temperature (T-MI) increases by similar to 3 K and the Curie temperature (T-c) increases similar to 4 K, and the resistivity decreases as the irradiation increases up to 1 x 10(12). However, we have observed that the T-MI reduces with an increase in resistivity for the fluence of 1 X 10(13). These results correlate well with the irradiation induced strain, creation of point defect and grain boundaries in the crystals. (C) 2009 Elsevier B.V. All rights reserved.