نتایج جستجو برای: cirsium
تعداد نتایج: 633 فیلتر نتایج به سال:
biological invasions form a major threat to the provision of ecosystems productsand services and can affect ecosystems across a wide spectrum of bioclimatic conditions.therefore, it is important to systematically monitor the spread of species over broad regions. ithas long been recognized that remote sensing and geographical information system couldcontribute to this capacity. this paper aims t...
خانواده تفریتیده یکی از بزرگ ترین خانواده های دوبالان محسوب می شود که تقریبا 4400 گونه از آن ها از زیست بوم های مختلف در دنیا شناسایی شده اند. به افراد این خانواده مگس های میوه می-گویند زیرا اکثر گونه ها روی میوه ها و سایر اندام های حامل دانه گیاهان در حال رشد زندگی می کنند. حشرات کامل این خانواده در روی گل ها و اطراف درختان میوه مشاهده می شوند در حالی که لارو-های آن با تغذیه از گوشت میوه، باعث...
Plants used for treating endoand ectoparasites of rabbits and poultry in British Columbia included Arctium lappa (burdock), Artemisia sp. (wormwood), Chenopodium album (lambsquarters) and C. ambrosioides (epazote), Cirsium arvense (Canada thistle), Juniperus spp. (juniper), Mentha piperita (peppermint), Nicotiana sp. (tobacco), Papaver somniferum (opium poppy), Rubus spp. (blackberry and raspbe...
Wiper applicators allow herbicides to be selectively delivered upright target weeds, thereby avoiding application nearby lower-growing desirable pasture plants. In this research, we investigated the efficacy of wiper four herbicides, clopyralid, metsulfuron, glyphosate and a triclopyr/picloram mixture, control Cirsium arvense (L.) Scop., troublesome weed pastures in New Zealand. The results sho...
Two endemic Cirsium species, C. leucopsis DC. and C. sipyleum O. Schwarz, and C. eriophorum (L.) Scop. growing in Turkey were investigated to establish their secondary metabolites, fatty acid compositions, and antioxidant and anticholinesterase potentials. Spectroscopic methods were used to elucidate the structures of thirteen known compounds (p-hydroxy-benzoic acid, vanillic acid, cis-epoxycon...
1. In endangered wooded pasture ecosystems established tree saplings are frequently found in spatial association with protective structures, suggesting nurse effects. This associational resistance is thought to be a driving force behind tree regeneration in wooded pastures. Experimental evidence for associational resistance is, however, scarce. We studied the effects of unpalatable plants on tr...
Postrelease studies can provide data with which to evaluate expectations based on prerelease tests of biological control insects. In 2004, we observed Trichosirocalus horridus Panzer (Coleoptera: Curculionidae), the rosette weevil introduced into North America against Eurasian thistles, feeding on native tall thistle, Cirsium altissimum L. Spreng., in tallgrass prairie. In this study, we examin...
Large igneous provinces, as the surface expression of deep mantle processes, play a key role in the evolution of the planet. Here we analyse the geochemical record and timing of the Pacific Ocean Large Igneous Provinces and preserved accreted terranes to reconstruct the history of pulses of mantle plume upwellings and their relation with a deep-rooted source like the Pacific large low-shear vel...
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