Pathogenic variability of Colletotrichum sp. from chilli anthracnose and their tolerance to carbendazim

Pathogenic variability of Colletotrichum sp.

  • Jannat Muhtarima Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202
  • Farzana Haque Tumpa Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202
  • Md. Rashidul Islam Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202
  • Md. Atiqur Rahman Khokon Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202
Keywords: Colletotrichum sp.; anthracnose; pathogenic variability; tolerance

Abstract

Twelve isolates of Colletotrichum capsici and Colletotrichum gloeosporides were isolated from anthracnose infected chilli fruits from different areas of Mymensingh. Isolated pure fungal isolates were grouped on the basis of their morphological characters viz. colony color and compactness, size, shape and number of conidia. The white colored isolates were identified as C. capsici and showed faster growth on PDA medium. In contrast, grey colored fungal isolates were identified as C. gloeosporides and comparatively slow growth on PDA medium. All the fungal isolates were pathogenically active and developed typical symptoms on both green and ripe fruits of chilli. The isolates of C. capsici collected from Kalibari showed the highest infection (74.99%) on fruit surface followed by Muktijoddhar bazar (61.83%). Differential tolerance was observed as fungal growth was different against 0.05% and 0.1% carbendazim while 0.2% carbendazim was lethal against all fungal isolates. The results indicate that severity of anthracnose of chilli is different may be due to aggressiveness of fungal and their tolerance against common fungicide like carbendazim.

J.Bangladesh Agril. Univ. 16(3): 417–423, December 2018

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Author Biographies

Jannat Muhtarima, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202

Department of Plant Pathology

Farzana Haque Tumpa, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202

Department of Plant Pathology

Md. Rashidul Islam, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202

Department of Plant Pathology

Md. Atiqur Rahman Khokon, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202

Department of Plant Pathology

Published
2018-12-27
How to Cite
Muhtarima, J., Tumpa, F., Islam, M., & Khokon, M. (2018). Pathogenic variability of Colletotrichum sp. from chilli anthracnose and their tolerance to carbendazim. Journal of the Bangladesh Agricultural University, 16(3), 417-423. https://doi.org/10.3329/jbau.v16i3.39411
Section
Crop Science