Abstract:
The experiment was conducted at the Central Laboratory of the Department of
Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207, during July
2014 to December 2015. Effect of hot water treatment at different temperatures
with varying durations on important seed-borne pathogens of rice, wheat, country
bean, tomato and eggplant seeds were studied. Seeds dipping in hot water at 50 to
60° e for 5, 10 and 15 mins were evaluated for standardization of temperature and
time for controlling seed-borne pathogens. Hot water treatment at 53/ 54°C for 15
mins gave the highest seed germination (90%) and completely eradicated seed
infection by Bipolaris oryzae and Fusarium spp. of rice seed. Wheat seeds dipped
in hot water at 51 / 52°e for 10 min yielded the maximum seed germination (90%)
and reduced seed infection of Bipolaris sorokiniana and Fusarium spp. For
country bean, 55 156°C for 15 mins was found effective with the highest seed
germination (85%) and no seed infection of Aspergilus niger. In case of tomato
and eggplant seeds 53 / 54°C for 15 mins gave the highest seed germination (88%,
90%, respectively) and no seed infection (0.0%). Hot water treated seeds sown in
the pot soil gave 33.75%,200/0,21.5%,22.5% and 20% higher seed germination,
respectively for rice, wheat, country bean, tomato and eggplant in comparison to
untreated control. Therefore, hot water treatment of specific temperature may be
suggested for controlling important seed-borne pathogens of rice, wheat, country
bean, tomato and eggplant seeds for enhancing seed germination and reduction of
seed infection.
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
