Abstract:
A survey was conducted in major 20 maize growing districts of Bangladesh for pest
risk analysis of maize. In the survey program, twenty Farmer, two Sub-assistant
Agriculture Officer, two Upazila level Officer, one District Level DAE Officials per
district were interviewed through pretested questionnaires for collecting data on maize
diseases and diseased sample were collected for identifying causal organism.
Isolations of causal organism were done in the M.S. laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka. The major and minor
diseases were determined by observing the prevalence of diseases in the field and
opinion expressed by the farmer. Considering the opinion expressed by the farmers,
field level officers and from field observations the 21 identified diseases of maize
were seedling blight, stalk rot, root rot, sheath blight, sheath rot, ear rot, bacterial leaf
blight, maydis leaf blight, Brown spot, tarcicum leaf blight, gray leaf spot, sugarcane
mosaic, downy mildew, maize streak, maize stripe, maize dwarf mosaic, anthracnose,
cob rot, store grain rot, cob sheath rot and cob sheath blight. The prevalent major
diseases were stalk rot, leaf spot, root rot, cob rot, sheath blight, sheath rot, cob sheath
blight, cob sheath rot, leaf blight, bacterial leaf blight, maize dwarf mosaic virus, corn
stunt, leaf virus, maize streak virus. Seedling and reproductive stages of maize plant
were found more vulnerable to diseases. There was a positive and high degree of
relationship among insect pest and disease incidence with weed infestation. The
probable sources of maize diseases were seed borne diseases from outside of the
country and use of fungicide as the best control measure of diseases. According to the opinion
of the participants, proper training on quarantine diseases, improvement of quarantine
laboratory and strengthening of quarantine law could be the best way for
improvement of quarantine disease situation of maize.
Description:
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
PLANT PATHOLOGY
