1Department of Seed Science and Technology, Indian Institute of Oil Palm Research, Research Centre, Palode-695 562, Kerala, India
2Department of Agricultural Economics, Kumaraguru Institute of Agriculture, Erode-638 001, Tamil Nadu, India
3Department of Agronomy, Sri Ramaswami Memorial University, College of Agricultural Sciences, Chengalpattu-603 001, Tamil Nadu, India
4Department of Seed Science and Technology, Tamil Nadu Agricultural University Madurai, Agricultural College and Research Institute, Madurai-625 104, Tamil Nadu, India
*Corresponding Author: S. Ambika, Department of Seed Science and Technology, Sri Ramaswami Memorial University, College of Agricultural Sciences, Chengalpattu-603 001, Tamil Nadu, India, Email: ambikasingaram@gmail.com
Online published on 12 July, 2023.
A study was conducted to evaluate in vitro efficacy of seaweed (Sargassum myriocystum and Sargassum wightii) and seagrass (Cymodocea serrulata and Syringodium isoetifolium) extract against the mycelial growth of Macrophomina phaseolina at different concentrations of 5, 10, 15 and 20% along with control by poison food technique. The result revealed that, the extract of S. wightii (20%) exhibited the highest suppression of mycelial growth (10, 25 and 38 mm) at 24, 48 and 72 h after incubation. Among the antagonists tested against Macrophomina phaseolina, the fungal Trichoderma viride was found to be the most effective in reducing mycelial growth than the bacterial antagonist Pseudomonas fluorescens. Both the antagonistic fungi and bacteria have compatibility with seaweed and seagrass extracts in the concentrations.
Macrophomina phaseolina, Red gram, Seagrass, Seaweeds, Soil-borne pathogen
