We evaluated knockdown caused by four insecticides: alpha-cypermethrin, chlorfenapyr, pirimiphos-methyl and fipronil against adults of Tribolium confusum Jacquelin Duval, the confused flour beetle and Oryzaephilus surinamensis (L.), the sawtoothed grain beetle. Bioassays were conducted on concrete and metal surfaces. Adults of the tested species were exposed on both surfaces treated with the ab...

A previously unknown class of dominant, maternal-effect lethal M factors was found to be widespread in natural populations of the flour beetle, Tribolium castaneum, collected on several continents. Such factors are integrated into the host chromosomes at variable locations and show the remarkable property of self-selection by maternal-effect lethality to all hatchlings that do not inherit a cop...

Twenty-seven Trichogramma and Trichogrammatoidea species or strains of different origin were tested on diamondback moth (Plutella xylostella (L.)) for host acceptance and host suitability. The experiments were conducted at 27 ± 2oC and 75-90% RH. Depending on their initial parasitization activity, the number of offspring produced and emergence ratio, 18 Trichogramrna species were identified as ...

Bu çalışmada iki yerel diatomit toprağı preparatının (Detech® ve Demite®) tek başına bunların kokusuz sarımsak tozuyla belli oranlardaki karışımlarının Kırma Biti, Tribolium confusum du Val. Coleoptera: Tenebrionidae)’ne karşı etkinliklerinin belirlenmesi amaçlanmıştır. amaçla buğday üzerinde 25±1 ˚C sıcaklık % 65±5 nispi nem ortamında topraklarının 600, 900 1500 ppm (mg DE/kg ürün) konsantrasy...

Population regulation results from an interplay of numerous intrinsic and external factors, and for many insects cannibalism is such a factor. This study confirms a previously-reported observation that sublethal exposure to the fossilized remains of diatoms (i.e. diatomaceous earth) increases net fecundity (eggs produced minus eggs destroyed/day) of flour beetles, Tribolium confusum. The aim wa...

The sea urchin, Mesocentrotus nudus, is widely distributed in North West Pacific regions. It has a substantial impact on macroalgal communities as generalist herbivore. This study examined various aspects of its feeding ecology, including algal preference, foraging behaviors, and possible effects past history preference. We used six common species (Ulva australis, Undaria pinnatifida, Sargassum...

Flour beetles of the genus Tribolium Macleay (Coleoptera: Tenebrionidae) are important stored product pests in China and worldwide. They are often found or are intercepted in grain depots, flour mills, and entry-exit ports, etc. Traditionally, Tribolium species are identified according to the morphological characteristics of the adult. However, it is almost impossible to rapidly identify adult ...