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Differential development and reproduction of the German cockroach (Dictyoptera: Blattellidae) on three laboratory diets



Differential development and reproduction of the German cockroach (Dictyoptera: Blattellidae) on three laboratory diets



Journal of Economic Entomology 85(3): 838-844



Development of nymphs and oocyte maturation in adults were examined in Blattella germanica (L.) reared on three commercial diets. Nymphs fed rat food developed significantly faster than nymphs fed two commercial dog foods. Similarly, oocytes matured more quickly in adult females that were raised on rat food than in females raised on dog food. Nymphal development and oocyte maturation were slower in insects that were fed whole dog food pellets than in insects fed ground dog food, suggesting that grinding the diet diminishes a mechanical barrier in whole dog food pellets. Comparisons of processed canine food and unprocessed canine food indicated that diets were significantly inferior after the steam extrusion process. Rat food is normally not subjected to such conditions and both processed and unprocessed rat food are equally suitable for B. germanica. The significance and implications for comparative studies with cockroaches are discussed.

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Accession: 002072544

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PMID: 1619105



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