Abstract:
Experiments were conducted at Bangladesh Agricultural Research Institute
(BARI) Joydebpur, Gazipur during 2004-2005 crop season. In field screening
of 14 germplasms under natural infection pressure of Bipolaris leaf blight 3
reached as resistant (Chirya-7, Shatabdi and BAW-966) and 1 reached as
moderately resistant (BA W -1006) to the disease. All the five fungicides
(Avistin-O.l %, Hayconazole- 0.05%, Nuben-0.2%, Sulphotox-0.2% and Tilt0.05%)
tested against Bipolaris sorokiniana, showed better performance over
control. Among them Tilt appeared most effective and resulted against the PDI
value of 72% and increased 108% grain yield over control. While effective
dose of four fungicides namely folicur (0.05 and 0.10%), Hexaconazole (0.05
and 0.1 %), Fujione (0.05 and 0.1%) and Akanazole (0.05 and 0.1 %) were
evaluated against Bipolaris leaf blight it was found that F2 D2.Exhibited most
effective one in reducing the disease and increasing higher yield and it showed
statistically similar to FIDI (Folicur, 0.05%) FID2 (Folicur, 0.1%) and F2Dl <,
(Hexaconazole (0.05%). In another study on determining avoidable loss of
wheat due to Bipolaris leaf blight indicated avoidable loss of27.05 and 14.20%
were due to the disease respectively, in Kanchon (Susceptible) and Shatabdi
(Moderately resistant) varieties.
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
