Efficacy of Organic Amendments on Wilt of Carnation (dianthus Caryophyllus L.) Caused by Fusarium Oxysporum F.sp.dianthi in Vitro

Studies were conducted to test the effect of oil cakes and organic manures on the growth of wilt pathogen under in vitro conditions. The extracts of different oil cakes and organic manures were tested against F.oxysporum f.sp.dianthi by poisoned food technique in in vitro. Least growth of pathogen was recorded in extracts of neem cake showing excellent inhibitory effect of 80.44 per cent reduction over control. Next best in order of merit was Mahua cake (75.11%) followed by neem seed kernel extract (60%) and pungam cake (38.22%) and least by others. Among the organic manures tested, vermicompost and composted coir pith showed maximum growth inhibition of 37.56 and 36.55 per cent over control, respectively.