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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 9, Issue 3 (2020)

Morphological and cultural studies among the isolates of Colletotrichum capsici causing chilli fruit rot

Author(s):

Rajappa Vithal, Mina D Koche, Aparna Tekade and BT Raut

Abstract:
Ten isolates of Colletotrichum capsici collected from different regions of Vidarbha, Marathwada (Maharashtra), Bidar district (Karnataka) and Guntur district (Andhra Pradesh) showing varied type of pathogenic ability against chilli variety Jayanti and designated as strongly, moderately and weakly pathogenic on the basis of per cent disease intensity. Morphological characters of ten different isolates with respect to radial mycelial growth, conidial characters, setae and acervuli were studied on PDA to know the variability among the isolates. Isolate Cc1, Cc6 and Cc7 exhibited similar colony colour, conidia and acervuli characters, Cc2 and Cc4 forming ash colonies with concentric rings, while Cc3, Cc8 and Cc9 showed white to ash colonies and Cc5 and Cc10 form light black colonies. Conidia of all the isolates were sickle shaped having oil globule at the centre but setae were longer than conidial mass in all the isolates. Among the ten isolates of C. capsici, maximum radial mycelial growth of 82.42 and 81.94 mm was recorded in Cc5 and Cc7 respectively, whereas minimum growth (74.28 mm) was recorded in Cc3 at 7 DAI. Micrometrical observations with respect to conidia, acervuli and setae revealed the differences. The dimension of conidia i.e. length and breadth among ten isolates ranges from 18.64 – 30.31 x 2.75 – 8.20 µm, whereas acervuli length was 295.96 µm and breadth 292.16 µm in Cc10. Maximum conidia length i.e. 30.31 µm and breadth 8.20 µm was observed in Cc4 and maximum length of setae (212.98 µm) in Cc7.

Pages: 1514-1518  |  714 Views  369 Downloads


Journal of Pharmacognosy and Phytochemistry Journal of Pharmacognosy and Phytochemistry
How to cite this article:
Rajappa Vithal, Mina D Koche, Aparna Tekade and BT Raut. Morphological and cultural studies among the isolates of Colletotrichum capsici causing chilli fruit rot. J Pharmacogn Phytochem 2020;9(3):1514-1518.

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