Biochemical differences in some forage sorghum varieties in relation to Pyrilla perpusilla Walker infestation

Singh, S. P. and Luthra, Y. P. and Joshi, U. N. (2007) Biochemical differences in some forage sorghum varieties in relation to Pyrilla perpusilla Walker infestation. Acta Phytopathologica et Entomologica Hungarica, 42 (1). pp. 17-23. ISSN 0238-1249

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Abstract

Assessment of the qualitative losses in different varieties of sorghum following Pyrilla perpusilla Walker infestation revealed the significant decrease in vitro dry matter digestibility of whole plant, leaves and stem by about 6.0, 3.5 and 3.0 per cent, respectively at more than 60 per cent infestation level and was mainly due to the corresponding increase in tannin content. The fibre components (NDF and ADF) were acting as an additional factor in reducing the dry matter digestibility. The dry fodder yield was also reduced by 46 to 53 per cent in different varieties of sorghum with an increase in infestation level from 0 to >60 per cent. The stem of all the varieties was more fibreous than the leaves as it had high content of NDF, ADF, cellulose and lignin. Leaves on the other hand had high amount of protein, total soluble sugars and reducing sugars than stem and were therefore more digestible than stem.

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