Abstract:
A survey was conducted at 10 upazilas of selected 6 major papaya growing
districts of Bangladesh to investigate the papaya viral diseases. The study area
were in upazila Kapasia and Sreepur under Gazipur district, Narshingdi Sadar
under Norsinghdi district, Jhikargacha, Monirampur and Keshobpur upazila
under Jessore district, Magura Sadar and Sripur upazila under Magura district,
Kaliganj upazila under Jhinaidah district and Modhukhali upazila under
Faridpur district. With the assistance of DAE, 20 farmers from each upazila
were selected for interview on the incidence and severity of viral diseases of
papaya crop in the field at seedling, flowering and fruiting stage. Direct
personal interview approach was adopted for collection of primary data.
Collected data were compiled, analysis and summarized by SPSS Software.
Results exhibits that identified 3 different viral symptoms from all over
working area at three distinct growth stage were selected for sample data
collection. Ringspot, mosaic and leaf curl symptoms were found as common
symptoms which cause severe damage to papaya. Experiment results revealed
that from both at farmers level information and field survey inspection papaya
ringspot symptoms were much destructive and cause severe losses of farmers
papaya field. After papaya ringspot, papaya mosaic and papaya leaf curl were
ranked, respectively and all of them were also serious in papaya growing
investigated areas. It was observed that ringspot in fruit, leaf curl in leaves and
in seedlings, mosaic in fruit and leaves were most destructive.
Description:
A Thesis
Submitted to the Department of Plant Pathology
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
Plant Pathology
SEMESTER: JANUARY-JUNE, 2016