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Effect of different grades of black pointed seeds on leaf blight
severity and healthy seed production of wheat was conducted in
field conditions. The grades were; 0= apparently healthy looking
seeds (Free from infection), 1= only embryo blackish, 2= embryo and
its adjacent area slightly infected, 3= embryo and less than 1/4 of
grains are discolored, 4= embryo and 1/2 of grains are infected and
5= grains are shriveled, almost completely discolored or more than
1/2 of grains are discolored. Seedling emergence and vigor index
were significantly decreased with the increase of severity grades
of black pointed seed. Significantly highest and lowest leaf blight
severity was recorded on the plants raised from grade 5 seeds and
grade 0 seeds respectively. The highest 1000 seed weight and grain
yield was recorded from the plots where apparently healthy seeds
were sown. The apparently healthy seeds (grade 0) increased 29.69%
grain yield over grade 5 seeds. Findings of the present study
emphasized the sowing of physically sorted apparently healthy
looking seeds to minimize leaf blight severity and increasing
quality yield of whea
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