Development of Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) and Damage to Selected Flours in Storage
Flours from maize, millet, sorghum, wheat and cassava, obtained from a local market in Abia State, Nigeria were evaluated for the development of Tribolium castaneum and consequent damage in the laboratory at ambient laboratory conditions of 28-34℃ and 58-75% RH for a period of 63 days. Twenty grams each of these flours were artificially infested with 5 pairs of adult T. castaneum in a 500 mls glass containers with netted lids. The experiment was set-up in a completely randomized design (CRD) and replicated four times. The results showed variations in the pre- and post- treatment proximate composition of the selected flours which influenced the development of the insect and flour damage. Irrespective of flour type, T. castaneum progeny development caused increase in moisture, ash content, and decrease in dry matter, fibre, metabolizable energy, and crude protein after treatment. The tested flours were susceptible to T. castaneum at varying degrees. Flours from wheat and sorghum were significantly (P < 0.05) more susceptible to infestation due to increased progeny development than others, whereas no progeny developed in cassava flours. There were significantly (P < 0.05) higher mean mortality of adult T. castaneum in maize flours (1.90) and least in wheat flours (0.25). Mean weight losses were also significantly (P < 0.05) higher in maize (25%) and least in cassava and millet flours (8.75%). The outcome of this study underscores the need of preventive measures against T. castaneum to avoid economic losses to flours destined for long storage duration.
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.