Abstract:
The efficacy of orne selected fungicides and plant extract was evaluated
against Alternaria brassicae and Alternaria brassictcola causing gray blight
of mustard (var AU Sarisha-I, Brassica campestrtss I~ perirnents were
conducted at the Farm of Sher-e-Bangla Agricultural Univer ity, Dhaka and
in the laboratory of Regional Agricultural Res earch Station, Bangladesh
Agricultural Research In trtute, Rahmatpur, Ban hal during rabi eas on
from the month of November, 2006 to February, 2007 Four fungicides viz
Rovral 50 WP (0.200)) Dithane M-45 (0.300), Ridomil 68 WP (0.200),
Bavisrin OF (0.100) and two plant extracts VIZ Garlic clove extract
Allamanda leaf extract were employed in the experiment. Among the
fungicides and plant extracts tested, Rovral 50 WP (0 2 0'0) showed the best
performance in reducing disease incidence and disea e seventy as well as
increasing eed yield against gray blight of mu tard. Seed infection b)
Alternaria spp wa reduced by 64 9000 and eed yield wa increased b)
48.1900 over control by the application of Ro ral No prorm mg results \\ ere
hown by the rest of the treatment against gray blight of mu lard
