Abstract:
In vitro and in vivo experiment were carried out to determine the effect of manual
seed sorting, seed solarization and seed treatment with Vitavax and hot water on
leaf spot (Bipolar is sorokiniana) and grain yield of wheat during the period from
November-200S to April, 2006 at the farm of Sher-e-Bangla Agricultural
University, Dhaka. The experiment was laid out in the Randomized Complete
Block Design (RCBD) with three replications, The highest reduction of incidence
of seed-borne Bipolaris sorokiniana was obtained by manually sorted healthy
looking seeds treated with Vitavax-200 (T4). Significant reduction of incidence of
same fungus was achieved by treating seeds with hot' water and solar heat.
Treatment of apparently healthy seed with Vitavax-200 (0.4%) was found best
in reducing the leaf infection, increasing seed germination and increased seed
yield which was followed by treatment of unclean seeds with Vitavax-200
(0.4%). Out of four physical seed treatment methods, solar heat treatment of
apparently healthy seeds was found to be the best in reducing leaf infection,
increasing seed germination and seed yield. Apparently healthy seed treated with
hot water increased seed germination, seed yield and also reduced the leaf
infection. Apparently healthy seeds showed more or less similar performances to
that of apparently healthy seed treated with hot water. The rest of the treatments
have some remarkable effect in controlling the disease and increasing seed yield of
wheat.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
