ORIGINAL ARTICLE
Bioefficacy of Trichoderma isolates against Aspergillus niger Van Tieghem inciting collar rot in groundnut (Arachis hypogaea L.)
1
Department of Biochemistry College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001, Gujarat, India
2
Plant Pathology, College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001, Gujarat, India
Corresponding author
Harsukh Gajera
Department of Biochemistry College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001, Gujarat, India
Department of Biochemistry College of Agriculture, Junagadh Agricultural University, Junagadh – 362 001, Gujarat, India
Journal of Plant Protection Research 2011;51(3):240-247
KEYWORDS
TOPICS
ABSTRACT
Antagonistic effect of 12 isolates of 3
Trichoderma
strains (
T. virens, T. viride, T. harzianum
) against the collar rot disease-causing fungus
A. niger,
was studied
in vitro
. It was observed that
T. viride
60 inhibited maximum (86.2%) growth of test fungus, followed
by
T. harzianum
2J (80.4%). The five varieties of groundnut grown in normal (T
1
), sick –
A. niger
infested soil (T
2
) and sick +
Trichoderma
viride
60 (seed treatment) (T
3
) in pot culture showed significant differences in the per cent of disease incidence of collar rot, up to 15
days after sowing (DAS). The per cent of collar rot disease incidence was higher in the GG-20 (67.4%) variety, followed by moderate
in GAUG-10 and GG-13 (46%), and minimum in J-11 and GG-2 (30%) in
A. niger
infected pot culture, at 15 days after sowing (DAS).
Based on collar rot disease incidence, groundnut varieties were screened as: susceptible, moderately susceptible and tolerant.
Trichoderma
seed treatment (T
3
)
reduced 51.6% of the disease incidence in susceptible varieties and 58.1% in tolerant varieties, at 15 DAS,
under
A. niger
infection (T
2
) in pot culture study
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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