Abstract
Colletotrichum gloeosporioides causing anthracnose which is a serious post harvest disease in mango accounting for 15-20% loss. The variation in nutritional and physiological characteristics among five isolates of C. gloeosporioides collected from different agro-climatic regions of India was investigated. All the isolates showed differential response in requirements of media, temperature and media pH for growth and sporulation. Malt Extract Agar (MEA) medium was best suited for growth in terms of radial mycelial diameter for all the isolates. Among the studied isolates, Cg 72 (from Maharashtra) showed more virulence and maximum sporulation (137.5×103 mL-1) at 28°C and media pH 6. Maximum growth and virulence at 28°C was observed with Cg 62 isolate. Media of pH 6 was found to be most suitable for the growth of respective isolates (s), but Cg 62 which was collected from Bihar found most virulent in this experiment.
Highlights
IntroductionMango (Mangifera indica L.) is one of the most popular seasonal fruit found mainly in the tropical and subtropical countries (Shad et al, 2002)
More recent reports on C. gloeosporioides revealed that ambient temperature, pH, free water or relativeMango (Mangifera indica L.) is one of the most popular seasonal fruit found mainly in the tropical and subtropical countries (Shad et al, 2002)
The effect of various factors such as media, media pH, temperature regimes and their combinations with days after inoculation on the growth (Table 2) and sporulation of C. gloeosporioides were studied for 5 isolates representing different agro climatic zones
Summary
Mango (Mangifera indica L.) is one of the most popular seasonal fruit found mainly in the tropical and subtropical countries (Shad et al, 2002). It is widely grown in different countries of the world and is attacked by a number of diseases of which anthracnose is one of the most common especially in India and loss due to this disease is substantial (Slade et al, 1987). Temperature and moisture requirements for infection are used to build forecasting systems for mango anthracnose a vital component for the disease management (Prakash and Srivastava, 1987). The fungus produces good aerial mycelium in Richard’s and Brown’s agar and profusely sporulates on oat meal and corn meal agar along with abundant development of acervuli in rings and few setae (Prakash and Srivastava, 1987)
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