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Effect of synthetic b vitamin and natural enrichment of flour on larval development and fecundity of tribolium confusum and tribolium castaneum


Effect of synthetic b vitamin and natural enrichment of flour on larval development and fecundity of tribolium confusum and tribolium castaneum



Entomologia Experimentalis et Applicata 21(1): 29-37



ISSN/ISBN: 0013-8703

DOI: 10.1111/j.1570-7458.1977.tb02653.x

Larval developmental time and adult fecundity of the flour beetles T. confusum and T. castaneum were measured on 12 different diets: top patent flour; top patent flour enriched with riboflavin, thiamine and niacin, singly or in combinations: top patent flour mixed with bran, germ or both; and whole wheat flour. Larval mortality did not exceed 5% on any of the diets. Larvae of both species developed slightly faster and laid significantly more eggs in flour enriched with the 3 vitamins than in unenriched patent flour. The improvement was due to the addition of riboflavin. Addition of thiamine or niacin or both did not accelerate development or increase fecundity. Top patent flour contained enough thiamine and niacin but not enough riboflavin for proper growth and development of flour beetles. Whole wheat flour was the best diet for T. castaneum, and the flour-germ-bran mixture for T. confusum. Larvae of T. confusum developed as rapidly in the mixture, as in whole wheat flour, but the adults laid significantly more eggs. T. castaneum was equally fecund on these diets, but developed faster in the coarser whole wheat flour. In both species, especially T. castaneum, dietary components had a greater effect on fecundity than on rate of larval development.

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Accession: 005274263

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