STUDIES ON ALTERNARIA LEAF BLIGHT DISEASE OF CLUSTER BEAN (Cyamopsis tetragonolobus (L.) Taub.)
KrishiKosh
View Archive InfoField | 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
|
|