Study of symptoms,
cultural characteristic and isolation of Cercospora species causing tikka disease
of ground in Ranchi district of Jharkhand
Shahdeo Prakriti and Kumar Anil
Res. J. Chem. Environ.; Vol. 29(2); 55-61;
doi: https://doi.org/10.25303/292rjce055061; (2025)
Abstract
Groundnut (Arachis hypogea L.) is one of the most popular oilseeds crops widely
grown in India. This crop is severely affected by leaf spot disease caused by Cercospora
species leading to brown to black coloured spots on the leaves which hinder the
market quality of the groundnut. The spotting is due to the attack of Cercospora
personata (Berk. and Curt.) Ell. and Ever. and Cercospora arachidicola Hori. The
present study concentrated on the study of symptoms, cultural characteristic and
isolation of Cercospora species causing tikka disease of ground.
The first visible symptoms appeared on the leaflets of lower leaves as dark spots
which at a later stage, were surrounded by yellow rings. Cultural studies of both
Cercospora species grown on PDA media showed that potato dextrose agar is good for
the growth. Both the fungus Cercospora arachidicola and Cercosporidium personatum
showed quite faster growth in the media used and comparatively same radial growth
on potato dextrose agar. However, fungi failed sporulate on the medium. Temperature
requirement of the fungus was found 25°C where good growth was observed.
