Two products, chips and flour, processed locally from six new cassava genotypes; 98/0505, 01/1368, 05/1636, 05/0473, 01/1371 and 01/1412 obtained from National Root Crops Research Institute (NRCRI), Umudike, Abia State, Nigeria were evaluated for losses (qualitative and quantitative) caused by rust red flour beetle Tribolium castaneum under storage conditions (25 to 30°C and 70 to 90% RH) in the General Laboratory, Faculty of Agriculture, University of Port-Harcourt. The response of each cassava genotype was evaluated by infesting 20 g lots of either chips or flour with 8 pairs of adult T. castaneum in 300 ml plastic containers with air tight lids. The trial was arranged in a completely randomized design in which treatments were replicated four times. With a few exceptions, cassava flour supported significantly more adults and immature T. castaneum progeny than chips; chips suffered significantly lower quantitative losses than flour. Cassava genotype 98/0505 was infested the most and consequently sustained the most damaged flour derived from it.
Key words: Tribolium castaneum, cassava, genotype, infestation, chip, flour.
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