Vol. 11, Issue 9 (2022)

Author(s):
Vibhanshu Dibyal, HC Lal and Manoj Kr. Barnawal

Abstract:
Present study was conducted for management of rust of linseed by alteration in date of sowing and spacing on rust severity, grain yield and effect of botanicals, plant extracts, cow urine and chemicals. The study reveals that management of rust of linseed by cultural method with three dates of sowing and four row to row spacing, D2 (9th November) was the best environment as rust disease severity was very low (11.50%) while in third date of sowing D3 (19th November) rust disease severity was high (17.0%). Thus, late sowing of linseed crop increased the disease severity. Wider spacing of 40 cm showed minimum disease severity (5.66%) and maximum grain yield of 807.68 Kg/ha while closer spacing (25cm) resulted in maximum disease severity (25.11%) and minimum grain yield (552.96 Kg/ha). Interaction between sowing date & spacing revealed that treatment having D3S1 i.e. 19th November sown crops at 25 cm spacing showed higher rust severity (26.67%) and minimum seed yield (521.68 Kg/ha) while D2S4 having 9th November sown crops with 40 cm spacing showed minimum rust severity (2.33%) and maximum seed yield (822.68 Kg/ha). Management of linseed rust using plant extracts, Garlic bulb extract @ 10% was highly effective giving minimum rust severity (17.33%) and maximum grain yield (816.7 Kg/ha) with 1.08:1 B:C ratio. Biocontrol agent Trichoderma harzianum @ 0.5% was moderately effective in controlling the disease (33.52%) with grain yield of 691.7 Kg/ha. Cow urine @ 0.5% and Pseudomonas fluorescens was least effective (26.52%) & (17.34%) in controlling the disease severity. In field trial on effect of fungicides, the treatment (T2) having Propiconazole @ (0.1%) showed minimum rust severity 4.9 per cent and maximum grain yield 867.29 Kg/ha with B:C ratio of 1.23:1.