Effect of method and date of sowing on the incidence of covered smut of barley.
Eight barley cultivars/genotypes were sown by two common methods of sowing i.e. pora and kera on 8 November 2005 at three different sowing times (8, 19 and 30 November 2005) in the field of Barley Research Area, CCS Haryana Agricultural University, Hisar, India during the 2005-06 cropping season. The covered smut (Ustilago hordei [Ustilago segetum]) appeared in the range of 1.47-66.70 and 0.92-42.60% on plant and tiller basis, respectively, in the pora method of sowing, whereas by kera method, it was low and ranged from 0.0 to 38.89% and 0.0 to 21.10% on plant and tiller basis, respectively. The reduction in disease by kera method of sowing ranged between 29.29 and 100 and 36.21 and 100% on plant and tiller basis, respectively, compared to pora method. Two cultivars, namely, BH-75 and BH-338 escaped from disease by kera method of sowing. Time of sowing revealed that disease incidence was maximum in first date of sowing i.e. 8 November 2005 ranging between 1.47 and 38.55 and between 0.63 and 23.22% on plant and tiller basis, respectively. There was reduction in disease incidence in the range of 27.02-100 and 31.13-100% on plant and tiller basis, respectively, in the second date of sowing (19 November 2005) compared to first date of sowing (8 November 2005) and it decreased further ranging from 46.12 to 100 and 56.80 to 100% on plant and tiller basis, respectively, in third date of sowing i.e. 30 November 2005. Genotype BH-338 escaped from disease in the second and third dates of sowing, whereas BH-331, BH-885 and BH-885 escaped in the third date of sowing.