This study screened the antidiarrhoeal, antimicrobial and cytotoxic effects of ethanol-extracted leaves of yellow oleander (Thevetia peruviana). The extract was tested against castor oil-induced diarrhoea in a model of albino rats and showed significant antidiarrhoeal activity (P<0.01). Disc diffusion technique was used to test the in vitro antibacterial activities of the extract and exhibited ...

Bioassays were carried out in the laboratory to determine the virulence of two Beauveria bassiana indigenous isolates on the greater wax moth Galleria mellonella. LC50 and LT50 values were taken as indices for the efficacy of fungal isolates, designated as Bb1 and Bb2, collected from Ismailia governorate in Egypt and isolated from soil and trap larvae of G. mellonella, respectively. The larvae ...

Different concentrations of selected heavy metals in the form of cadmium chloride (CdCl2), copper sulphate (CuSO4), lead nitrate (Pb (NO3)2) and mercuric nitrate (Hg (NO3)2) were tested against immature and mature stage of C. pipiens to assess the toxicity, LC50, total carbohydrate and lipid content. The survival potential of 2 instar larvae was highly affected by the contamination with the tes...

Corn earworm, Helicoverpa zea (Boddie), is a significant pest of agroecosystems in the midsouthern and southeastern regions of the United States. These insects have developed resistance to, or inconsistent control has occurred with, most insecticide classes. With their unique mode of action, insecticides in the diamide class have become a key component in management of agriculturally important ...

Ninety-six ethanolic extracts from various parts of 84 Thai plant species were tested for their larvicidal activity against Aedes aegypti mosquitoes. Extracts from Rhinacanthus nasutus, Derris elliptica, Trigonostemon reidioides, Homalomena aromatica, Stemona tuberosa and Acorus calamus possessed high larvicidal activity, with LC50 values between 16.0 and 48.2 mg/l. Petroleum ether (PE) and met...

Herbal medicines possess a great demand in both developed and developing countries as a source of primary health care owing to their attributes having wide biological and medicinal activities, high safety margins and lesser costs. People living in rural areas of Nepal depend largely in the herbal medicines for the treatment. The present study concerns with the study of pharmacognostic character...

Leaves of Artemisia annua linn. and Azadirachta indica were extracted in petroleum ether and hexane respectively by different methods of extraction i.e. cold extraction, reflux extraction and soxhlet extraction. The crude extract obtained was tested against third instar larvae of Anopheles stephensi. On comparison of larval mortality of crude extract obtained by these three methods, both soxhle...

The methanol extract of Cassia fistula seeds was investigated for potential antimicrobial activity against medically important bacterial, yeast and fungal strains. The antimicrobial activity was determined in methanol extract using the disk diffusion technique and the broth dilution method. The extract was effective on tested microorganism and the minimum inhibitory concentration (MIC) values w...

Methanolic extracts of the leaves of Atlantia monophylla (Rutaceae) were evaluated for mosquitocidal activity against immature stages of three mosquito species, Culex quinquefasciatus, Anopheles stephensi, and Aedes aegypti in the laboratory. Larvae of Cx. quinquefasciatus and pupae of An. stephensi were found more susceptible, with LC50 values of 0.14 mg/l and 0.05 mg/l, respectively. Insect g...

In globe, Pyllanthus niruri is a well-established medicinal herb studied by many researchers, grown widely in many parts of West Bengal. The present study was aimed to predict the acute toxicity as LC50 in Daphnia magna and Pimephales promelas and rat oral LD50 value as well as Ames mutagenicity by using QSAR modeling software, T.E.S.T. (Toxicity Estimation Software Tool) for commonly found phy...