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VOL. 8, ISSUE 3 (2026)
Cultural characterization of Colletotrichum truncatum causing anthracnose of soybean on different media
Authors
Meghana M B, Gowdar S B, Amaresh Y S, Aswathanarayana D S, Umesh Hiremath
Abstract
Anthracnose caused by Colletotrichum truncatum is a major
constraint in soybean (Glycine max (L.) Merrill) production. The understanding
of the pathogen's cultural behaviour is essential for isolation and management
protocols. The growth and cultural characteristics of pathogen were evaluated
on 12 solid and corresponding liquid media, both synthetic and non synthetic
media. Among the solid media, the maximum mycelial
growth was recorded on potato dextrose agar (PDA) with a mean colony diameter
of 90.00 mm, while Asthana and Hawker's agar recorded the minimum growth (60.00
mm). Excellent sporulation (++++) was observed on malt
extract agar, whereas poor sporulation (+) was observed on host leaf extract
agar and no sporulation was observed on V-8 juice agar despite the medium
supporting relatively good mycelial growth of 80.00 mm. In liquid media, V-8 juice broth produced the highest dry mycelial
biomass (297.43 mg) and minimum dry mycelial
weight was observed in water sucrose broth (11.25 mg). Excellent sporulation
(++++) was observed in malt extract broth and potato dextrose broth. No
sporulation was observed in Asthana and Hawker's broth, carrot broth, carrot
dextrose broth, Czapek Dox broth, host leaf extract broth, Richard's broth,
Sabouraud's broth and V-8 juice broth. The results indicate that
medium composition strongly influences both the vegetative and reproductive
phases of the pathogen and that biomass accumulation and sporulation are not
always favoured by the same medium offering a practical basis for selecting
media for inoculum multiplication in future anthracnose research.
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Pages:97-102
How to cite this article:
Meghana M B, Gowdar S B, Amaresh Y S, Aswathanarayana D S, Umesh Hiremath "Cultural characterization of <i>Colletotrichum</i> <i>truncatum </i>causing anthracnose of soybean on different media". International Journal of Ecology and Environmental Sciences, Vol 8, Issue 3, 2026, Pages 97-102
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