Abstract:
Seedlings diseases of coconut and the effect of weather parameters on the
diseases were studied during 2010 to 2012 in different growing locations of
Bangladesh with an effort to development a suitable disease management
practice. Important plant pathogens Pestalotia sp., Cercospora sp., Curvularia
sp. and Phytophthora sp. were detected and identified as causal agent of leaf
spot and leaf blight diseases of coconut seedlings. Disease incidence and
severity observed higher in Dhaka than Khulna in different nursery surveyed.
Effect of weather parameters on incidence and severity of diseases were
studied and significant variations were observed. The highest disease incidence
(84.60%) and severity (33.74%) was recorded by the effect of Pestalotia sp.
And the lowest disease incidence (2.25%) and severity (2.83%) was recorded
by the effect of Phytophthora sp. Temperature, relative humidity and rainfall
act as parameter in this study. The highest disease incidence and severity
occurred in the month of April and July and the lowest in December.
Effectiveness of four chemical fungicides viz. Cupravit 50 WP, Mancozeb,
Ditbane M-45 and Bavistin 50 WP were evaluated on coconut seedling
diseases in the nursery. Among the treatments applied Cupravit 50 WP and
Dithane M-45 showed better result than Mencozeb and Bavistin in controlling
disease incidence and severity of leaf spot and leaf blighted diseases of
coconut.
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
IN
PLANT PATHOLOGY
