Cultural and morphological variability in Colletotrichum gloeosporioides.
Venkatravanappa V., Nargund V. B.
Author Affiliation: Department of Plant Pathology, College of Agriculture, UAS campus, Raichur, India.
Journal of Plant Disease Sciences 2 : 193-197
Abstract : Cultural and morphological characters of populations of six monoconidial isolates of Colletotrichum gloeosporioides [Glomerella cingulata] a anthracnose pathogen of mango was investigated. The maximum radial growth was found on PDA (83.98 mm) and least (77.40 mm) on host leaf extract media. Further, on synthetic media Asthana and Hawker's 'A' agar supported maximum mean colony diameter of 81.80 mm and minimum mean mycelial diameter was recorded on Czapeck's agar. Colony colour of six isolates is bluish back to black in centre but variable towards margins. Maximum mycelial dry weight on non-synthetic and synthetic was recorded in RCR and BLR, respectively. Conidia size that ranged between 12.13-21.83 µm × 4.34-7.67 µm and 12.1-20.73 µm × 4.30-6.25 µm was observed on PDA and host leaf in the test isolates.