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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2019, Volume : 7, Issue : 2
First page : (375) Last page : (381)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7301

In vitro Efficacy of Fungicides, Botanicals and Bioagents against Brown Leaf Spot of Rice Caused by Bipolaris oryzae

Meghana S. Nayak* and Hiremath S. V.

Department of Plant Pathology, College of Agriculture, Dharwad
University of Agricultural Sciences, Dharwad-580005, Karnataka, India
*Corresponding Author E-mail: meghananayak.1600@gmail.com
Received: 16.02.2019  |  Revised: 23.03.2019   |  Accepted: 1.04.2019  

 ABSTRACT

Effect of fungicides, botanicals and biocontrol agents against brown leaf spot of paddy caused by Bipolaris oryzae were evaluated under laboratory conditions at Department of Plant Pathology, College of Agriculture, Dharwad, Karnataka during 2018-19. The fungicides were evaluated at different concentrations using poison food technique. Systemic fungicides were evaluated at 0.05, 0.1 and 0.15, non-systemic fungicides at 0.1, 0.2 and 0.3, combi products at 0.05, 0.1 and 0.2 and botanicals were evaluated at 5, 7.5 and 10 per cent concentration respectively with four replications. The results revealed that, the maximum mean per cent of mycelial inhibition was observed in captan 50 % WP (73.98 %), propiconzole 25 % EC (100 %) and tebuconazole 50 % + trifloxystrobin 25 % 75 WG (100 %) in non systemic, systemic and combi products, respectively. The mean mycelia inhibition increases with increasing in concentration of fungicides. Among the botanicals crude neem oil (32.55 %) gave maximum mean per cent of mycelial inhibition which was significantly superior to other treatments. The least mean per cent of inhibition of the fungus was recorded in ginger rhizome extract (6.53 %). Dual culture technique was used to evaluate the antagonistic activities of the bioagents maximum mycelial inhibition (62.75 %) followed by Bacillus subtilis (51.76 %). Least mycelial inhibition was observed with fungal antagonistic organism Trichoderma harzianum (27.06 %)

Key words: In vitro, Fungicides, Botanicals, Bio-agents, Inhibition

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Nayak, M.S. and Hiremath, S.V., In vitro Efficacy of Fungicides, Botanicals and Bioagents against Brown Leaf Spot of Rice Caused by Bipolaris oryzae, Int. J. Pure App. Biosci.7(2): 375-781 (2019). doi: http://dx.doi.org/10.18782/2320-7051.7301