Results 101 to 110 of about 27,373 (224)

Attack of \u3ci\u3eUrophora Quadrifasciata\u3c/i\u3e (Meig.) (Diiptera: Tephritidae) A Biological Control Agent for Spotted Knapweed (\u3ci\u3eCentaurea Maculosa\u3c/i\u3e Lamarck) and Diffuse Knapweed (\u3ci\u3eC. Diffusa\u3c/i\u3e Lamarck) (Asteraceae) by a Parasitoid, \u3ci\u3ePteromalus\u3c/i\u3e Sp. (Hymenoptera: Pteromalidae) in Michigan [PDF]

open access: yes, 2018
Urophora quadrifasciata (Meig.) a seedhead fly released in North America for biological control of Centaurea maculosa and C. diffusa is parasitized by a Pteromalus sp. Parasitism up to 60% of U.
Hansen, Richard W   +2 more
core   +2 more sources

Nuevas localidades y una nueva variedad de Centaurea ultreiae Silva Pando (Compositoe) [PDF]

open access: yes, 2002
New localities and a new variety of Centaurea ultreiae Silva Pando (Compositae). Palabras clave. Centaurea, Compositae, corología, A Coruña, España.Key Words.
Blanco Dios, Jaime Bernardo
core   +4 more sources

Binodoxys centaureae

open access: yes, 2019
Binodoxys centaureae (Haliday, 1833) Figs 114, 217, 313, 414, 551 Host records Uroleucon sp. (Starý 1976; Laamari et al. 2012). Distribution in the Middle East and North Africa Algeria (Starý 1976; Laamari et al. 2012). General distribution Eastern and Western Palaearctic, Oriental.
Rakhshani, Ehsan   +8 more
openaire   +1 more source

Nuevos hábitats, nuevas amenazas: Centaurea x kleinii (C. moncktonii x C. solstitialis), nueva especie híbrida entre dos malas hierbas invasoras

open access: yesCollectanea Botanica, 2010
La alteración antrópica del hábitat da paso a la cohabitación de especies importadas que nunca coexistirían en su ámbito natural. Centaurea solstitialis y Centaurea moncktonii son dos especies invasoras cuyas distribuciones en Eurasia apenas se solapan ...
C. T. Roché, A. Susanna
doaj   +1 more source

New Proposals on Portuguese Vegetation (II) [PDF]

open access: yes, 2010
As a consequence of the geobotanical studies that have been developed in west and southern areas of the Iberian Peninsula, four new phytosociological associations are proposed, integrated in the perennial mesophytic grasslands of Stipo giganteae ...
Meireles, Catarina   +2 more
core  

Sesquiterpene lactones from Centaurea thessala and Centaurea attica. Antifungal activity

open access: yesPhytochemistry, 2000
The aerial parts of Centaurea thessala ssp. drakiensis and C. attica ssp. attica afforded, in addition to several known sesquiterpene lactones, two new eudesmanolides, 4-epi-sonchucarpolide and its 8-(3-hydroxy-4-acetoxy-2-methylene-butanoyloxy) derivative and one new eudesmane derivative, named atticin.
Skaltsa, H.   +5 more
openaire   +4 more sources

Sesquiterpene lactones. XXXI. New guaianolides in Centaurea bella Trautv. and Centaurea adjarica Alb.

open access: yesActa Societatis Botanicorum Poloniae, 2014
Nine new guaianolides. I of which are chlorinated, were isolated from the dried, above-ground parts of Centaurea bella Trautv. They are: cebellin A. B, C, D, E. F, G, H and 1. l he known guaianolides centaurepensin and repdiolide were also found.
Gerard Nowak   +4 more
doaj   +1 more source

Phylogeny of the Centaurea group (Centaurea, Compositae) – Geography is a better predictor than morphology

open access: yesMolecular Phylogenetics and Evolution, 2014
The Centaurea group is part of the Circum-Mediterranean Clade (CMC) of genus Centaurea subgenus Centaurea, a mainly Mediterranean plant group with more than 200 described species. The group is traditionally split on morphological basis into three sections: Centaurea, Phalolepis and Willkommia. This division, however, is doubtful, especially in light of
Andreas Hilpold   +12 more
openaire   +8 more sources

Essential oil composition of two Centaurea L. (Asteraceae) species from Turkey

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2015
In this study, aerial parts of C. cynaus L. and C. depressa Bieb. were analysed by HS-SPME/GC-MS. As a result thirty five and thirty seven components were identified representing 92.3% and 91.1% of the oil, respectively.
Ömer Kılıç
doaj  

A contribution to the karyological knowledge of the genus Centaurea L. (Asteraceae) in the Iberian Peninsula. Sect. Seridia (Juss.) DC. [PDF]

open access: yes, 2013
Se da a conocer el número cromosómico de 10 taxones del género Centaurea pertenecientes a la sección Seridia (Juss.) DC. presentes en la Península Ibérica. En el caso de Centaurea lusitanica var. crassifolia P. Silva, C. aspera subsp. stenophylla (Dufour)
Devesa Alcaraz, Juan Antonio   +2 more
core  

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