INFLUENCE OF ABIOTIC FACTORS ON THE GROWTH OF Colletotrichum musae CAUSING POST HARVEST ANTHRACNOSE DISEASE IN BANANA
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 2
Abstract
Banana (Musa spp.) is the most important fruit in many tropical and subtropical region of our country. It is affected by many post harvest diseases, among them anthracnose is considered as the most important disease of banana in the global level and is one of the major constraints to banana production. Effect of different pH, temperature and light intensity on mean mycelial growth of different isolates C. musae under in vitro was studied. The results revealed that pH 7 recorded the maximum mean mycelial growth of 88.50 mm in C5 isolate and the minimum mean mycelial growth of 49.50mm was recorded in C8 isolate. The maximum mean mycelial growth of 88.69 mm was recorded at 30°C and the lowest mean mycelial growth was recorded at 35°C (45.86mm). The results revealed that all the isolates of C. musae grew well when they were exposed to alternate cycles of 12h dark and 12h light. The highest mean mycelial growth of 82.50mm was recorded when the isolates were exposed to alternate cycles of 12h light and 12h and the lowest mean mycelial growth of 35.59mm was recorded when the isolates where exposed to 12h dark. Thus it may be concluded that the temperature, pH and light are the critical factors for the growth of pathogen in vitro, which might be the main reason for the expression of banana anthracnose symptoms under postharvest conditions.
Authors and Affiliations
P. MUTHULAKSHMI, B. RAGAVI, S. PARTHASARATHY
Keywords
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