Effect of Sitophilus oryzae (L.) {Coleoptera: Curculionidae} Infestation on Protein in Sorghum Varities in Nigeria.

BAMAIYI, L. J., ONU, I., AMATOBI, C. I. AND DIKE, M. C.

ABSTRACT. Ten sorghum (Sorghum bieolor (L.) Moench) varieties were infested with Sitophilus oryzae (L.) for 3 months in each of 2000, 2001, and 2002 to evaluate the effect of pest damage on protein content, determined as the, product of total nitrogen
(obtained using Micro-Kjedahl method) and a factor of 6.25. Over the 3 years, ,% total protein. in the uninfested grains steadily declined with increasing storage .duration whereas in. the infested -grains the values increased. The increase was attributed to
accumulation of insect frass, exuviae and immature stages.

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