Croton zehntneri (Euphorbiaceae) is a native aromatic plant from Northeast region of Brazil. The monoterpenoid estragole (ESL) has been isolated by classical chromatographic methods from the essential oil (EO) of C. zehnteneri leaves and characterized by GC-FID and GC-MS, its antimicrobial and cytotoxic potentials being assessed. The analysis of the EO enabled the identification of 100% of the ...

To evaluate the larvicidal efficacy of methanol extract Calotropis procera experiments were conducted against larvae Aedes aegypti and Culex quinquefasciatus mosquito species. Third instar selected mosquitos species exposed to various concentrations (50-200 ppm) evaluated in laboratory. The morality observation was recorded at 24 hrs. After treatment. LC values leaf determined following Probit ...

In a search for natural products that could be used to control schistosomiasis, nineteen extracts of eleven medicinal plants from eastern China have been tested for molluscicidal activity against snail Oncomelania hupensis. The n-butanol fraction of the fresh leaf from Buddleja lindleyana Fortune, Buddlejaceae, showed significant activity against the snails. Statistical analysis revealed that t...

In order to define the phytotoxic potential of Salvia species a database was developed for fast and efficient data collection in screening studies of the inhibitory activity of Salvia exudates on the germination of Papaver rhoeas L. and Avena sativa L.. The structure of the database is associated with the use of algorithms for calculating the usual germination indices reported in the literature...

A chitin synthesis inhibitor, novaluron, was evaluated under laboratory conditions for its larvicidal activity against a field population of the housefly, Musca domestica L. (Diptera: Muscidae), by feeding and dipping methods. The concentrations used were 1, 2.5, 5, 10 and 20 mg a.i./kg in both methods. The product caused >80% larval mortality at 10 and 20 mg a.i./kg. Of the two methods, feedin...

The effect of aqueous and alcoholic extracts of the leaves of Mallotus philippensis (Lam.) Muell. Arg. was studied on the spontaneous movements of the whole worm and nerve-muscle (n.m.) preparation of Setaria cervi and on the survival of microfilariae in vitro. Both the extracts caused inhibition of spontaneous motility of whole worm and the n.m. preparation of S. Cervi characterized by initial...

Vector control is the foremost step to diminish the mosquito borne diseases as the proper vaccinations are yet to develop against those obnoxious diseases. After many resistant cases, it is important to develop other sources of eco-friendly insecticides. The present piece of study was designed to evaluate the mosquito larvicidal efficacy of Operculina turpethum against malarial vector Anopheles...

Laboratory experiments were conducted to determine the efficacy of two cyanobacterial toxins (microcystin and nodularin) against the different larval instars, pupal and adult stages of Anopheles multicolor. Experiments were carried out in plastic cups, and the two toxins were tested at four concentrations, where the LC10, LC25, LC50 and LC90 for the first instar larvae under laboratory conditio...

The best way to control mosquito borne diseases is to control the mosquito population. The present study was executed to evaluate the mosquito larvicidal activity of Nicotiana plumbaginifolia leaves against malarial vector Anopheles stephensi.Crude extracts and three different solvent extracts were bio-assayed against An. stephensi larvae. LC50 and LC90 values were determined appropriately. Qua...

Laboratory bioassays were conducted to determine the response of larvae of a susceptible strain of diamondback moth Plutella xylostella (L.) from the Rio Grande Valley of south Texas to five classes of insecticides. Test insecticides were permethrin, methamidophos, endosulfan, methomyl and Bacillus thuringiensis. Three monitoring techniques were developed and tested as methods of determining th...