1Kalasalingam School of Agriculture and Horticulture, Kalasalingam Academy of Research and Education, Krishnankoil-626 126, Tamil Nadu, India
2Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil-626 126, Tamil Nadu, India
*Corresponding Author: R. Kannan, Kalasalingam School of Agriculture and Horticulture, Kalasalingam Academy of Research and Education, Krishnankoil-626 126, Tamil Nadu, India, Email: kannanrdst@gmail.com
Online published on 9 May, 2023.
Mango productivity was very much affected due to a major fungal pathogen, Colletotrichum gloeosporioides causing anthracnose mango rot. The present study was carried out to investigate the influence of abiotic factors for the support of superficial growth of isolated fungus and finding a minimum inhibitory concentration of different fungicides.
Among four different culture media tested, the highest radial growth and sporulation of the fungus were recorded in Oatmeal agar (OMA) (84 mm) followed by Conn's agar (CA), Czapek Dox agar (CDA) and Potato dextrose agar (PDA). Among the different pH tested, pH 7.0 was found to be the best in supporting the good radial growth (69 mm) followed by pH 6.0 (56 mm), pH 5.5 (49 mm), pH 7.5 (43 mm) and pH 8.0 (37 mm). Among the various temperature tested, 25°C (69.32) was found to be the best followed by 20°C (52.53 mm), 30°C (65.23 mm) and 35°C.
Among the fungicides tested, Zineb 68% + Hexaconazole 4% WP (avtar) was found best as the radial growth was observed to be 45, 41, 36, 32, 25 mm at 5, 10, 25, 50 and 100 ppm, respectively as compared to 80 mm in control. The fungicide Tricyclazole 18% + Mancozeb 62% WP (Merger) was found to be the least effective in checking the radial growth of C. gloeosporioides even at 100 ppm concentration.
Anthracnose, Colletotrichum, Fungicides, Mango, pH, Temperature
