Effect of Light and Temperature on the Sporulation and Mycelial Growth of Mycosphaerella fragariae

Effect of light and temperature on the sporulation and mycelial growth by 4 strains of Mycosphaerella fragariae was examined. The light source was day light fluorescent lamps with an intensity of 2000 Lux at the colony surface. The treatment were constant light, alternating light(10hr) and darness (14h.) and constant darkness af 1. Of the 4 strains tested, alternating light and darkness at gave the greatest sroducedtion, constant light in intermediate, constant darkness in minimum, but darkness at produced abundant conidia over that obtained in the other two treatment. Differences in number of sporulation due to light, strains and the interaction of these two were all statistically significant. 2. There were not on significant differences in amount of mycelial growth due to light, but amount of mycelial growth of strain were the nest abundant among the 4 strains.