Vol. 12, Issue 9 (2023)

Author(s):
Hiranya Kr. Deva Nath, Dalim Pathak, Bidisha Borah and RN Borkakati

Abstract:
Alternaria blight is an important disease of Linseed that limits both the productivity and oil content. In the present investigation, three plant defense inducers, viz., salicylic acid, Monopotassium phosphate and sodium propionate were evaluated against the disease in different concentrations and combinations. Field experiment was conducted in Randomised Block Design with ten treatments in three replications during the year 2019-20 and 2020-21. Seed treatment and foliar application at 30 and 45 days after sowingwith salicylic acid @100 ppm was found most effective in controlling the Alternaria blight with a significant reduction in disease severity (84.21%) and increased yield up to 107.23 percent over control. This was followed by seed treatment with salicylic acid @ 100 ppm and foliar application of Monopotassium phosphate @ 1% at 30 and 45 days after sowing with 77.37 and 92.05 percent disease reduction and increase in yield, respectively.