of different Trichoderma species against agriculturally important
foliar plant pathogens
Prabhakaran1,2, Thokala Prameeladevi1*, Muthukrishnan
Sathiyabama2 and Deeba Kamil1
1Division of Plant
Pathology, Indian Agricultural Research Institute, New Delhi-110 012, India.
Plant Science, School of Life Sciences, Bharathidasan University,
Tiruchirappalli - 620 024, India
Author E-mail: email@example.com
21 October 2013
15 March 2014
20 March 2014
isolates of Trichoderma were isolated from soil samples which were
collected from different part of India. These isolates were grouped into four
Trichoderma species viz.,?? Trichoderma asperellum (Ta), T.
harzianum (Th), T. pseudokoningii (Tp) and T. longibrachiatum
(Tl) based on their morphological characters. Identification of the above
isolates was also confirmed through ITS region analysis. These Trichoderma
isolates were tested for in vitro biological control of Alternaria solani,
Bipolaris oryzae, Pyricularia oryzae and Sclerotinia
sclerotiorum which cause serious diseases like early blight (target spot)
of tomato and potato, brown leaf spot disease in rice, rice blast disease,
and white mold disease in different plants. Under in vitro conditions, all
the four species of Trichoderma (10 isolates) proved 100% potential
inhibition against rice blast pathogen Pyracularia oryzae. T.
harzianum (Th-01) and T. asperellum (Ta-10) were effective with
86.6% and 97.7%, growth inhibition of B. oryzae, respectively. Among
others, T. pseudokoningii (Tp-08) and T. longibrachiatum (Tl-09) species were
particularly efficient in inhibiting growth of S. sclerotiorum by
97.8% and 93.3%. T. longibrachiatum (Tl-06 and Tl-07) inhibited
maximum mycelial growth of A. solani by 87.6% and 84.75. However, all the T.
harzianum isolates showed significantly higher inhibition against S.
sclerotiorum (CD value 9.430), causing white mold disease. This study led to
the selection of potential Trichoderma isolates against rice blast,
early blight, brown leaf spot in rice and white mold disease in different
activity, Biocontrol, Dual culture technique, Foliar plant pathogens, Trichoderma
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