Efficacy of Systemic Fungicides and Bio- Control Agents Against Neck blast Disease of Rice Against Pyricularia Oryzae
International Journal of Development Research
Efficacy of Systemic Fungicides and Bio- Control Agents Against Neck blast Disease of Rice Against Pyricularia Oryzae
Received 17th September, 2023; Received in revised form 29th October, 2023; Accepted 13th November, 2023; Published online 23rd December, 2023
Copyright©2023, Harwinder Singh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Rice, scientifically known as Oryza sativa, serves as a staple food for 17 countries in Asia, providing 20% of the world's dietary energy supply. Rice productivity is limited by biotic and abiotic constraints in India (Pathaket al. 2021). Among biotic stresses, rice blast disease caused by Magnaporthe oryzaeis the most important fungal rice disease causing enormous yield losses in different parts of the world (Annegowdaet al.2021). It can infect the rice crop at all stages of its growth, from nursery to grain filling stage under conducive environmental conditions (Panda et al. 2017).The commonly used management approaches to deal with blast are fungicides or to develop resistant varieties. Fungicides have proven to be effective in controlling rice blast and are commonly used worldwide. Different systemic and broad-spectrum fungicides have been tested and recommended for neck blast control. These fungicides have been evaluated under In vitro andIn vivo conditions to assess their toxic effects on the blast fungus (Yoon et al. 2011)So, in order to assess the efficacy, five commercial fungicides were tested. In vitro evaluation of different fungicides and bio-control agents on inhibitory activity of Pyricularia oryzae through dual culture and food poisoned food technique. The efficacy of five different fungicides were evaluated in vitro condition for per cent inhibition of growth of P. oryzae at three different concentrations (25, 50,100 ppm) and revealed that highest mean per cent inhibition (94.45 %) of blast pathogen was recorded in Nativo 75 WG whereas least ineffective fungicide was Beam 75 WP which caused inhibition of only 74.78 % compared to control. Three different bio-agents (T. viride, P. fluorescens and B. subtilis) were evaluated out of which maximum inhibition pathogen growth was recorded by T. viride (62.16 %) whereas least inhibition was recorded in B. subtilis with inhibition of (43.99 %).
