DETERMINANT OF RESISTANCE IN BREAD WHEAT GENOTYPES AT DIFFERENT DATE OF SOWING TO SPOT BLOTCH DISEASE
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 19
Abstract
Present investigation was carried out to evaluate the eight varieties of wheat against spot blotch disease and their performance under different date of sowing. Among the three different sowing date the plant height of all genotypes increased with delayed sowing, except in Shatabdi the plant height remained more or less unaltered, no correlation was found between the plant height and disease resistance however strong correlation was recorded in thousand kernels weight and disease resistance in almost all varieties except Francolin, however early date of sown recorded higher thousand kernels weight (48.16 g). The Area under disease progress curve was significantly lower in 16th November (D1) (423.37) sowing and increased with every date of delayed sowing. Irrespective of varietal mean AUDPC found highest in Sonalika (487.77) and lowest in Shatabdi (248.95). Among the variety and date of sowing maximum yield was obtained in 16th November (D1) in all eight varieties and tend to decrease with every day of delayed sowing. The varietal mean revealed that highest yield in Shatabdi (1796.81 g), though the lowest yield was found in DBW-14 (1487.00 g). It may be concluded that different varieties gave different response to spot blotch disease. The AUDPC and yield of crop were also highly influenced by date of sowing. The optimum date of sowing for all varieties in North Bengal is 16th November.
Authors and Affiliations
BINOY CHHETRI
Keywords
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