Ethanol extracts of 83 plants species belonging to the Asteraceae (Compositae) family, collected in the State of Minas Gerais, Brazil, were tested for larvicidal activity against the mosquito Aedes fluviatilis--Diptera: Culicidae). The extract from Tagetes minuta was the most active with a LC90 of 1.5 mg/l and LC50 of 1.0 mg/l. This plant has been the object of several studies by other groups a...

Over the past 3 centuries, many species have been dispersed beyond their natural geographic limits by humans, but to our knowledge, reproductive isolation has not been demonstrated for such neo-allopatric species. We grew seeds from three species of Centaurea (Centaurea solstitialis, Centaurea calcitrapa, and Centaurea sulphurea) that are native to Spain and have been introduced into California...

THE TITLE COMPOUND [SYSTEMATIC NAME: 3,8-dihydr-oxy-3-(hydroxy-meth-yl)-9-methyl-6-methyl-enedeca-hydro-azuleno[4,5-b]furan-2(3H)-one], C(15)H(22)O(5), is a sesquiterpene lactone showing the typical tricyclic guaianolide skeleton which has been isolated, together with other related metabolites, from the plant Centaurea musimomum. The present study confirms the mol-ecular structure, assigned by ...

There were found 2 new species in the Tyumen Region. Localities of Leuzea repens (L.) D. J. N. Hind during inventory herbarium collections Institute Biology State University, Atoction armeria(L.) Raf. – field research 2021 year. given labels for each taxon, habitat information and distribution Russia.

The phylogenetic position of hexaploid Elymus repens within the tribe Triticeae (Poaceae) was examined using cloned sequences from the low-copy nuclear genes encoding phosphoenolpyruvate carboxylase (pepC) and beta-amylase. A previous analysis of E. repens using data from the nuclear granule-bound starch synthase I (GBSSI) gene had yielded five phylogenetically distinct gene copies, two more th...

The article presents the effect of different insertion buckwheat as a catch crop on weediness spring barley and bean crops. research was carried out in 2019–2020 at farm Virmantas Pocius, located Pakruojis District, two fields, near Draudeliai Village. experiment variants were following: 1) tillage cover crops autumn (control); 2) shallow to depth 5 cm autumn; 3) deep 20 autumn. In control crop...

Bu araştırma, Ulaş – Kangal (Sivas) arası florasını kapsamaktadır. Araştırma materyali, 18 ay süre ile toplanan bitki örneklerinden oluşmaktadır. içinde 420 örnekten, 218 takson tayin edilmiştir. taksonun 57’si (%26,1) Türkiye için endemiktir. bölgesinin 36 familya ve 128 cins oluşturmaktadır. Toplam taksonlardan 2’si Pteridophyta, 216’si Spermatophyta bölümlerine aittir. Angiospermae alt bölüm...