Impact of Integrated Agro technologies on the weeds, Orabanche and cured leaf yield in a sun cured chewing tobacco (Nicotiana tabaccum L.) in Southern India.

Abstract

Field experiments were conducted at ICAR CTRI research station farm, Vedasandur to find out the effect of integrated agro technologies on the weeds, orabanche, yield and quality of chewing tobacco. The treatments comprised of main plots viz. Soil solarization and Non Soil solarization and sub plots viz. Traditional nursery seedlings + Furrow irrigation +100% RDF, Traditional nursery seedlings + alternate furrow irrigation +100%RDF, Tray seedlings + Furrow irrigation +100% RDF, Tray seedlings + alternate furrow irrigation +100% RDF, Tray seedlings + alternate furrow irrigation + 80% RDN+100% RD of P&K. The experiment was conducted in a split plot design with three replication. Soil solarization reduced the monocot weed population by 30 to 39 % over the non soil solarization. The fresh weight of monocot weeds reduced by 54 and 55 % at 40 DAT and at harvest stage respectively with soil solarization over non soil solarization. The dry weight of monocot significantly reduced by 50 and 30 % with 40 DAT and at harvest stage respectively with soil solarization as compared to non soil solarization. Soil solarization significantly reduced the dry weight of dicot weeds by 78 and 91 % at 40 DAT and at harvest respectively over non soil solarization. Soil solarization significantly reduced the dry weight of orabanche by 77 and 41 % at 60 DAT and at harvest stage over non soil solarization. It could be concluded that soil solarization with tray seedlings planting + 100% RDF + furrow irrigation efficiently controlled the weeds of mono