Management of Alternaria Blight of Linseed (Linum usitatissimum) Caused by Alternaria lini

By : S. K. Holi , Suresh Meena

Page No: 47-50

Abstract
Alternaria blight caused by Alternaria lini is a serious disease of linseed causing losses to the extent of 23-60 per cent. The disease appears from seedling stage to seed setting stage and losses are found to be proportional to the disease intensity when it appear on bud forming stage. In the present study efficacy of fungicide viz. Rovral, Copper oxychloride, Dithane M-45, Propiconazole, Difenconazole, Carbendazim and Topsin were evaluated both in vitro and in vivo. In vitro evaluation Propiconazole (0.1%) completely inhibited the growth of Alternaria lini and was found significantly superior over the rest of fungicides. Field experiment was conducted in Randomised Block Design with eight treatments in three replication during the year 2010-11. The fungicide Dithane M-45 (0.2%) was found most effective showing disease control up to 44.06% and 12.54% disease incidence followed by Rovral (0.2%) which showed disease control 42.50% and 12.89% disease incidence respectively. The highest yield was obtained by the treatment Dithane M-45 (0.2%) 722 kg/ha followed by Rovral (0.2%) 674 kg/ha.

Authors :
S. K. Holi : Plant Pathology Section, College of Agriculture, Nagpur-440 001 (Dr. PDKV, Akola)
Suresh Meena : Department of Plant Pathology SKN College of Agriculture (S.K.N. University of Agriculture) Jobner-303329, Rajasthan