Subsequently three experiments were conducted in the Seed Pathology Laboratory,
net house and experimental field of Sher-e Bangla Agricultural University, Dhaka.
Bangladesh during the period from October 2005 to April 2006 to study the
varietal reaction of leaf blight of wheat caused by Bipolaris sorokiniana.The
wheat seeds of varieties Sonalika. Kanchan, Barkat, Shatabdi, Aghrani. Pavon-76,
Akbar. Gourab, Sourav and Protiva were collected from Bangladesh Agricultural
Research Institute (BARI), Gazipur. In laboratory experiment the maximum
number of conidia/seed (320) was recoded for the variety Sonalika and minimum
number of conidia/seed (100) was recorded in variety Shatabdi Maximum lesion
length (11.67 cm) on inoculated root was recorded from the variety Sonalika. No
lesion i.e. infection (0.00 cm) was recorded in the varieties Shatabdi and Akbar. In
blotter test maximum germination (92.00%) was recorded in the variety Shatabdi.
Sourab and Agrani and minimum (72.00%) was recorded in the variety Sonalika.
Maximum (37%) incidence of seed borne Bipolaris sorokinianawas recorded in
the variety Sonalika and minimum (17%) in Shatabdi. At panicle initiation stage,
flowering stage, milking stage and hard dough stage minimum disease severity
was recorded in the variety Shatabdi and maximum in the variety Sonalika. The
highest grain yield/pot (5.97 g) was recorded in the variety Gourab. In the field
maximum disease severity in all the counting periods was recorded in the variety
Sonalika and minimum in the variety Shatabdi. The highest number of healthy
spikelets/ear (26.77), number of grains/ear (38.66), number of healthy grains/ear
(37.41) and 1000-seed weight (42.12 g) were recorded in the variety Shatabdi. The
highest grain yield/plot (391.77 g) was recorded in the variety Shatabdi and the
lowest yield/plot (183.08 g) was recorded in the variety Aghrani.