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Researcher Timbadiya, A. D.
Advisor Rajani, V. V.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher JAU
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Plants (Botany) ♦ Specific topics in natural history
Subject Keyword Plant Pathology ♦ €œmanagement of Root Rot [fusarium Solani (mart.) Sacc.] of Cluster Beanâ€
Abstract Cluster bean (Cyamopsis tetragonoloba (Linn.) Taub.) is one of the important vegetable crops of India. Root rot caused by Fusarium solani (Mart.) Sacc has become a severe problem in previous years with a severe threat to successful and profitable cultivation of cluster bean in Junagadh district. Looking to the seriousness of the disease, present investigation with special emphasis on in vitro testing of fungicides, herbicides, bio control agents, phytoextracts and fungi isolated from rhizosphere of cluster bean was carried out. Cluster bean root rot produced various types of symptoms in pot and field conditions viz., yellowing and drooping of leaves, followed by death of plants within a few days. Roots of affected plants showed a reddish brown discoloration with bark shredding symptoms of decayed roots followed by death of plants. The fungal pathogen was isolated from diseased plant on PDA and pathogenicity was successfully proved by soil inoculation method. Based on the morphological and cultural characters viz., mycelium, microconidia, macroconidia and chlamydospores, the causal fungus was identified as Fusarium solani (Mart.) Sacc. Among the systemic fungicides tested under in vitro conditions, tebuconazole (100%) was found to be the most effective which was followed by propiconazole (92.35%). In case of non systemic fungicides, copper hydroxide and copper oxychloride proved to be the most effective and gave cent per cent growth inhibition of F. solani. In combination products of fungicides, cymoxanil + mancozeb, metiram + pyraclostrobin and carbendazim + mancozeb were found most effective and gave cent per cent growth inhibition of F. solani. While tested of different herbicides in which oxyflurofen was found to be the most effective followed by glyphosate, 63.64 and 63.52 per cent respectively. Among nine phytoextracts tested, maximum growth inhibition was observed in neem, (66.05 %) and termeric (61.25 %) at 10 per cent concentration. While in the fungal antagonists, T. viride was most effective in growth inhibition of test fungus. Next best was T. harzianum- I followed by T. harzianum- II, T. harzianum- III, T. hamatum and T. virens. Among the fungal biocontrol agents isolated from cluster bean rhizosphere , Aspergillus niger was most effective in growth inhibition (66.63%)of test fungus which was followed by, Trichoderma sp-7 (55 %). Effect of bio-control agents and fungicides on cluster bean root rot caused by F. solani was evaluated under pot condition. Highest reduction in disease incidence and dead plants were recorded in the treatment of T. viride. It was at par with tebuconazole.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Junagadh
Size (in Bytes) 99.05 MB
Page Count 111