Fig. 3. Survival (S) of E. coli strain CSRO6 in dosimeter packets following exposure to various wavebands in relation to UV-B dose (D) measured with a YES broad-band radiometer. Packets were exposed to sunlight for up to 40 min while covered with foil (No light), a filter that blocked UV-B and UV-C (+UV-A/no UV-B), a band-pass filter that transmitted UV-B and UV-A but blocked visible wavelengths (+UV-A/+UV-B), or no covering (Full sunlight). The experiment was conducted on DOY 163, 1997. n = 3 at each dose.