In this study, search for new mosquitocidal bacterium was attempted from the gut content of fresh water fish Clarias batrachus (walking cat fish) which resulted in isolation a highly potential bacterium. The isolate identified as Bacillus cereus VCRC 641 by species specific molecular markers ilvD, pur and pycA gene sequence analysis. Laboratory mosquito larval toxicity assay (bioassay) against ...

Abstract Background Entomopathogens such as nematodes, bacteria and fungi are well recognized for their biocontrol potential. This study was carried out to examine the insecticidal properties of Heterorhabditis bacteriophora Poinar, Beauveria bassiana Balsamo-Crivelli, Bacillus thuringiensis Berliner, individually in combination against 3rd instar larvae Spodoptera litura Fabricius (Noctuidae: ...

BACKGROUND & OBJECTIVES Deltamethrin plays an important role in controlling malaria vectors, and is used in indoor residual spraying and manufacture of long-lasting insecticidal mosquito nets. The residual activity of deltamethrin (K-othrine WP 5%) @ 25 mg/m(2) was studied in laboratory conditions on different surfaces. METHODS The surfaces were made artificially with different building mater...

In this paper, we have reported that split ring resonators (SRRs) structures can be used for bioassay applications in order to further improve the assay time and sensitivity. The proof-of-principle demonstration of the ultrafast bioassays was accomplished by using a model biotin-avidin bioassay. While the identical room temperature bioassay (without microwave heating) took 70 min to complete, t...

beauveria bassiana (balsamo) vuillemin is an important natural regulator of insect populations. identification of a suitable molecular marker for detecting a virulent phenotype on a target pest would be useful in screening for effective isolates against the pest. nine isolates of b. bassiana were tested for their virulence to adults of tribolium castaneum (herbst) in laboratory bioassay with 1×...

Two in vivo bioassay methods, a rat medium-term liver bioassay and a rat multiorgan bioassay, can be used for detecting carcinogenic or modifying potentials of endocrine active substances (EASs) on endocrine disruption (ED). The first bioassay, the rat mediumterm liver bioassay, is fundamentally based on the two-step hypothesis of liver carcinogenesis; initiation with diethylnitrosamine (DEN, 2...

Plant-parasitic nematodes attack is an important problem on crop production worldwide. Meloidogyne javanica a potentially damaging pest of several crops. Laboratory studies were conducted to examine the effect supernatant liquid from synthesis silver nanoparticles with agricultural wastes survival and hatching juveniles eggs. The experiment consisted five treatments (carbofuran, corn cobs, rice...