Record Details

STUDIES ON ALTERNARIA LEAF BLIGHT DISEASE OF CLUSTER BEAN (Cyamopsis tetragonolobus (L.) Taub.)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title STUDIES ON ALTERNARIA LEAF BLIGHT DISEASE OF CLUSTER BEAN (Cyamopsis tetragonolobus (L.) Taub.)
 
Creator SRIKANTH REDDY POLKA
 
Contributor KRISHNA MURTHY, K.V.M
 
Subject STUDIES, ALTERNARIA, LEAF, BLIGHT, DISEASE, CLUSTER, BEAN
 
Description Alternar ia cucumerina var cyamopsidis (Rangaswami and
Rao) Simmons causing Alternaria leaf blight disease on clusterbean
was isolated and identified.
Eight fungal species viz., Tr ichoderma vir ide, Trichoderma
harzianum, Aspergillus niger, Aspergillus flavus, Drechslera sp,
Fusarium sp, Curvularia sp, Helminthosporium sp. from the
phyllosphere of clusterbean were isolated and identified. Significant
quantitative differences among different phyllosphere fungal species
were found. Tr ichoderma viride was of the highest frequency with
mean number of 31.40 fungal colonies per Petri dish.
All the eight species tested in vitro showed antagonism
towards growth of A.cucumerina to varying degrees. Trichoderma
vir ide caused the highest level of inhibition of growth of Alternar ia
cucumerina var. cyamopsidis (78.08%).
The antagonistic effect of Trichoderma vir ide was more
pronounced in seeded agar method compared to dual culture
method. Culture filterate of Trichoderma viride exhibited the highest
level of growth inhibition (58.88%) of Alternaria cucumerina var.
cyamopsidis followed by culture filterate of T. harzianum.
The growth of Trichoderma viride was more affected by
mancozeb of 1000ppm concentration but the fungus was less
incompatible with the fungicides at low concentration.
The plant extract of Allium sativum followed by plant
product, neem oil were found to be more effective in inhibiting the
growth of Alternaria cucumerina var. cyamopsidis.
Both biotic and abiotic factors were found to have induced
resistance in clusterbean against Alternar ia cucumerina var.
cyamopsidis, but to different levels. Salicylic acid 100 ppm was
most effectiv e followed by heat killed conidial suspension of
Alternar ia cucumerina var. cyamopsidis in limiting the disease
severity, mean number of lesions and size of the lesions.
 
Date 2016-08-20T09:55:57Z
2016-08-20T09:55:57Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73102
 
Language en
 
Relation D7622;
 
Format application/pdf
 
Publisher ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD