We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. Such property is retained well at a very wide range of incident angles too. Light of shorter wavelengths are harvested at upper parts of...

Synthesis of bicyclic [1] and tricyclic [2] terpenoid lactones and the preliminary results of biological tests for their feeding deterrent activity [3] previously were presented. The tests, which were carried out on three storage pest insects: the grain weevil (Sitophilus granarius L.), the confused flour beetle (Tribolium confusum Duv.) and the khapra beetle (Trogoderma granarium Ev.), showed ...

In insects, hydrophobic odorants are transported through the sensillar lymph to receptors on sensory neurons by odorant-binding proteins (OBPs). The beetle Tenebrio molitor, which is a pest of stored grain products, produces a set of 12–14-kDa OBP-like proteins in its hemolymph. The structure of one of these proteins and that of a moth pheromone-binding protein have been solved. Both proteins h...

The efficacy of diatomaceous earth (DE) to control stored-products Coleoptera on stored grain was examined against several populations of the red flour beetle, Tribolium castaneum (Herbst). Four commercially available DE formulations were tested: INSECTO, Perma-GuardTM, Protect-It and the diatomite used for the production of Dryacide, each at six concentrations (100-1000 ppm). A great variation...

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 susceptibility of various life stages of the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), a pest of stored wheat, Triticum aestivum L., to flameless catalytic infrared radiation in the 3-7-microm range was evaluated in the laboratory. Immature stages were collected from flour infested with T. castaneum adults only for 1 d. Stages collected after 1 d represente...

the carabid beetle pterostichus (phonias) strenuus (panzer) is newly recorded from iran. it was collected by hand from ghaleroudkhan forests in the caspian province of guilan. this carabid beetle is widely distributed throughout the palaearctic region including europe, uzbekistan, kazakhstan and russian far east.

ptinidae or spider beetles, is a worldwide family of beetles especially distributed in the subtropical and temperate zones including iran. niptus holoeucus (golden spider beetle) from kangohar cave in fars province (iran) is described as new record for iran. we regarded this beetle as a troglophile and guanophile species.

fumigant toxicity of various doses of essential oils (185.2, 370.4, 555.5, 740.7, 925.4, 1111.1, and 1296.3 µl/l water) from five officinal plants, including rosemary (rosmarinus officinalis), lavender (lavandula vera), fennel (foeniculum vulgare), tarragon (artemisia dracunculus)and summer savory (satureja hortensis)on two stored products pests, cowpea weevil (callosobruchus maculatus) and red...

in laboratory experiments the toxicity of acetone was investigated against four species of stored-product insects. in empty-space trials, estimates of the lethal concentrations of acetone (lc, 72-h exposure) for 50% mortality against adults of the lesser grain borer, rhizopertha dominica (f.), red flour beetle, tribolium castaneum (herbst), rice weevil, si-tophilus oryzae (l.) and eggs of the a...