Int.J.Curr.Microbiol.App.Sci.2020.9(11) : 3743-3746

DOI : https://doi.org/10.20546/ijcmas.2020.911.448

Under neem tree, weeds namely Sida acuta, Malvastrum coromendelianum, Ruellaprostrata, Commelina benghalensis, Abuitlon indicum, Hibiscus micranthus, Aervalanata, Acalypha indica, Leucas aspera, Physalis minima, Tribulus terestries and Mellingtonis hortensis (tree seedlings aged 2 years) are observed in Agricultural College and Research Institute, Madurai. Among these weeds, the severe infection of vein clearing is found in more number of plants of Malvastrum coromandelianum and Sida acuta. This Malvastrum being already reported with a specific virus (Malvastrum Yellow vein virus) reported in China. Sida acuta is highly susceptible for vein clearing and also leaf curl virus of tomato which was reported earlier. This infection is observed during October month in these volunteer plants continuously for the two years (2019 & 2020). The population of the vector whitefly is also observed in the Malvastrum coromandelianum and Sida acuta, this may facilitate for the transmission of the virus and Eventhough, with vector population, these species alone being observed with infection with this specific virus remaining weeds are not infected hence this may be host specific. Hence Malvastrum coromandelianum is documented as highly susceptible to this specific virus and needs research on infecting to the crops.

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