Abstract:
Guava, the major fruit crops of Bangladesh, was surveyed during the period of
July, 2010 to April, 2012. Three experiments were carried out to study the nursery
diseases of guava and to observe the effect of temperature, relative humidity and
rainfall on the occurrence of disease incidence and severity on seedlings. Important
plant pathogens Colletotrichum gloeosporioides, Pestalotiopsis spp., Pseudomonas
syringae pv. syringae were identified and the incidence and severity of
anthracnose, scab and leaf blight of guava at seedling stage were studied.
Significant variations in development of these diseases were observed in varied
weather factors. Occurrence of seedling disease was correlated with temperature,
rainfall and relative humidity. That is why there was great variation of disease
incidence and severity of guava from one location to another as well as from one
season to another season. These weather parameters should be critically addressed
for each host-pathogen system to find out the most appropriate time to combat the
disease at minimum effort.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In partial fulfilment of the requirements
For the degree of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
SEMESTER: JANUARY-JUNE, 2011
