Department of Plant Pathology, Agricultural College, Bapatla Acharya N G Ranga Agricultural University, Hyderabad - 500 030, India
* CTRI-Research Station, Guntur.
To study the effect of temperature and pH on spore germination and germ tube growth of Corynespora cassiicola, a leaf spot causing fungus, the experiment was conducted in BOD incubators at 95% relative humidity. The spore germination and germ tube growth of the fungus occurred over a temperature range of 10–35°C with maximum germination of 94.66% and germ tube growth of 107.83 μm at 25°C. Spores failed to germinate at 40°C. The germination and germ tube growth were found at all pH values ranging from 3–9 with maximum percentage of germination (95.66%) and germ tube growth (98.61 μm) at pH 6. Minimum percentage of germination and germ tube growth was observed at pH 3.
