<div style="text-align:justify">A study was conducted to evaluate in vitro efficacy of seaweed (<em>Sargassum myriocystum</em> and <em>Sargassum wightii</em>) and seagrass (<em>Cymodocea serrulata</em> and <em>Syringodium isoetifolium</em>) 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 <em>Macrophomina phaseolina</em>, the fungal Trichoderma viride was found to be the most effective in reducing mycelial growth than the bacterial antagonist <em>Pseudomonas fluorescens</em>. Both the antagonistic fungi and bacteria have compatibility with seaweed and seagrass extracts in the concentrations.</div>


<p>Antifungal Properties of Selected Seaweed and Seagrass Extracts against <em>Macrophomina phaseolina</em> Infecting Pigeon Pea</p>


<div>Wetlands include a wide variety of habitats such as marshes, peatlands, floodplains, rivers and lakes and coastal areas such as salt marshes, mangroves and seagrass beds, but also coral reefs and other marine areas no deeper than 6 m at low tide, as well as human-made wetlands such as paddy lands, waste-water treatment ponds and reservoirs. According to Ramsar convention the wetlands are classified as three types <em>viz.,</em> coastal/marine wetlands, inland wetlands and human made wetlands. According to UNCC, the estimated wetland cover of world is more than 1210 Million hectares and in that 13-18% are on the Ramsar List of Wetlands of International Importance, which are protected sites. In India 49 major wetland sites) are recognized as Ramsar sites of international importance. India has a variety of wetland ecosystem that support diverse and unique habitats because of diverse climatic condition and it is one amongst the 17 mega diverse countries. Total wetland area of Tamil Nadu is 9.02 lakh ha which is 6.92% of the geographic area and out of them Kancheepuram district is having highest total wetland area of about 8.91%.&nbsp;</div>


Antifungal Properties of Selected Seaweed and Seagrass Extracts against Macrophomina phaseolina Infecting Pigeon Pea

Classification, Distribution, Features, Biodiversity and Functions of Wetlands: A Review