Many organisms across the Metazoa have regenerative abilities with potentially conserved genetic mechanisms that can enlighten both medicine and evolutionary studies. Here, the role of canonical Wnt signaling was examined in the red flour beetle Tribolium castaneum in order to explore its role during metamorphosis and larval leg regeneration. Double-stranded RNA mediated silencing of Wnt-1 sign...

The cuticular hydrocarbons of insects are species-specific and often function as semiochemicals. The activity of Tribolium brevicornis cuticular hydrocarbons as feeding deterrents that ostensibly function to prevent pupal cannibalism and predation was evaluated. The cuticular hydrocarbons of T. brevicornis pupae were characterized and flour disk bioassays conducted with individual and combined ...

Abstract Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) is one of the most destructive pests stored products. Although there have been studies on potential use essential oils from plants in Artemisia genus as insecticides, no comprehensive bioactivity data are available efficacy vulgaris L. (Asterales: Asteraceae) oil and its chemical constituents stored-product pests. Therefore, this...

Experimental infection systems are important for studying antagonistic interactions and coevolution between hosts and their pathogens. The red flour beetle Tribolium castaneum and the spore-forming bacterial insect pathogen Bacillus thuringiensis (Bt) are widely used and tractable model organisms. However, they have not been employed yet as an efficient experimental system to study host-pathoge...

The Tribolium castaneum (Herbst) and Rhyzopertha Dominica (Fab.) are potential pests of stored wheat products that causes destruction to grains all over the world. current investigation was planned examine bifenthrin chlorfenapyr for T. (red flour beetle) R, (Lesser grain borer). A total 50g sample taken in jars. Both were applied at concentrations 0.25, 0.5, 1, 2, 4ppm, separately. Factorial d...

The use of native promoters to drive transgene expression has facilitated overexpression studies in Drosophila and other insects. We identified 12 Tubulin family members from the genome sequence of the red flour beetle, Tribolium castaneum, and used the promoter from one of these to drive constitutive expression of a transgene. The activity of the T. castaneum alpha-Tubulin1 (TcalphaTub1) putat...

Spinosad, a reduced-risk commercial insecticide derived from a bacterial fermentation product, possesses both contact and oral toxicities against insects. Contact toxicity of spinosad to adults of Rhyzopertha dominica (F), Sitophilus oryzae (L), and Tribolium castaneum (Herbst) was evaluated by exposure for 24 or 48 h to treated glass Petri dishes. Adults were exposed to different deposits (0.0...

Highly phosphine-resistant populations of Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) have recently been found in Oklahoma grain storage facilities. These Þndings necessitate development of a phosphine resistance management strategy to ensure continued effective use of phosphine. Therefore, we investigated the efÞcacies of tw...

IN the fall of 1986 my colleague, Dick Beeman, sat in my office at Kansas State University and told me a fascinating story. He worked at what was then called the U. S. Grain Marketing Research Laboratory, a U. S. Department of Agriculture facility about a mile from campus. He was trained as an insect toxicologist, but to aid in his research he had become a self-taught geneticist using the red f...

The septate gregarine parasites of flour beetles (Tribolium spp.) include Gregarina minuta Ishii, 1914, a relatively small species in which both primite and satellite possess an obvious protomerite, and a larger species that lacks the satellite protomerite. The latter species has been placed in the genera Didymophyes and Hirmocystis by various authors, but studies reported here demonstrate that...