The ever-increasing threat from infectious diseases and the development of insecticide resistance in mosquito populations drive the global search for new natural insecticides. The aims of this study were to evaluate the mosquitocidal activity of the extracts of seaweed Bryopsis pennata against dengue vectors Aedes aegypti and Aedes albopictus, and determine the seaweed's toxic effect on brine s...

Chemical analysis of the aqueous and n-butanol fractions methanolic extract Stipagrostis plumosa Munro ex T.Anderson, Poaceae, aerial parts led to isolation seven known phenolic glycosides 3,4′-dihydroxypropiophenone-3-O-β-d-glucoside, 5′-methoxy-3,4′-dihydroxypropiophenone-3-O-β-d-glucoside, 3′5′-dimethoxy-3,4′-dihydroxypropiophenone-3-O-β-d-glucoside, 3,4,5-trimethoxyphenyl-β-d-glucopyranose,...

Three new resin glycosides, quamoclins V (1), VI (2), and VII (3) and a new tetrahydropyran derivative, quamopyran (4), were isolated from the seeds of Quamoclit pennata BOJER (Convolvulaceae). The chemical structures of these compounds were determined primarily on the basis of spectroscopic data. The carboxyl group of the aglycone, 11S-convolvulinolic acid, of 1 and 2 was linked intermolecular...

The objective of this study was to quantify the effects of protection on herbaceous species composition, total plant cover, dry matter, plant density, floristic richness and diversity. Characteristics of vegetation under continued grazing and protected area for 10 and 65 years were examined in a degraded arid environment in South Tunisia. Our results show that protection enhances significantly ...

Flora and vegetation data of the nature monument regional importance “Elandinsky stones” (Tselinnyy district, Altai Krai) are given. comprises 283 species higher vascular plants, including 2 rare species: Paeonia hybrida, Stipa pennata. Vegetation is represented by petrophyte forb-feathergrass steppe, for Bijsk-Chumysh upland, forb-grasses meadow, birch forests bushes.

A species known from earlier behavioural studies as "Holoplatys sp.", is described as Trite pollardi sp. nov. Within the genus Trite, two species groups are distinguished: the planiceps-group (found in New Caledonia, New Zealand, Lord Howe Island and Norfolk Island) and the incognita-group (limited to New Zealand). The three alternative scenarios of the Trite origin, relationships and radiation...