Abstract:
The experiment was conducted in the fann of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh, during the winter season 2009-2010 to
evaluate the efficacy of fungicides, poultry manure and neem seed extract
against purple blotch of onion. The field experiment was laid out using
onion variety Taherpuri to evaluate the eighteen different treatments
combination of fungicides, poultry manure and neem seed extract with
different spray schedules. A positive and significant effect of fungicides,
poultry manure and neem seed extract was found in respect of % plant
infection, % leaf infection, % Leaf Area Diseased (%LAD) and yield of
onion. The highest performance in reducing disease incidence and disease
severity of purple blotch of onion was found by the application of
treatment PDF 1S7 where soil was amended with poultry manure and
onion seedlings were dipped in Rovral SOWP solution followed by foliar
spraying with same fungicide at seven days interval. The highest onion
bulb yield (S.063t/ha) was recorded in case of application of treatment
PDF 187• Neem seed extract also showed better performance in
combination with poultry manure in reduction of disease incidence and
severity as well as increasing yield
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
