The aecidiospores of the blister rust fungi of Korean pine were irradiated by laser to see the killing effect and the results are reported.The matured spores were irradiated with CO2 laser of 10.6μm with a power density of 5w/ cm2. 92.14% and 90.66% of the aecidiospores were killed when the spores were irradiated directly 19 seconds and 2 seconds respectively.
