Physiological characterization of Colletotrichum gloeosporioides isolates from Mangifera indica

Abstract

Anthracnose comprises in the main pre- and post-harvest disease of mango, causing damage on the leaves and fruits. This work aimed to carry out a physiological and pathogenic characterization of five isolates of Colletotrichum gloeopsorioides from mango trees cv. Amrapali. For the physiological characterization, the isolates were cultivated under different light regimes (0h, 12h and 24h) at 25°C, wherein daily measurements were taken up to 6 DAI (Days after inoculation) to obtain mycelial growth averages, and at 6 DAI spore quantification. Then, the pathogenic potential of the isolates was evaluated, through measurements of lesions on the top surface of the leaves at 2, 4, 6, 8 and 10 DAI. Both evaluations were carried out in a completely randomized design. Isolates of C. gloeosporioides cultivated under 12 hours light at temperature of 25°C obtained the best physiological development and the highest pathogenic development was observed in the regime of 0 hours light.