| weeds as a source of plant growth promoting rhizobacteria in agricultural soils. | the influence of plant growth promoting (pgp) activity of bacterial communities recovered from each of six weed species (barnyard grass (echinochloa crusfalli (l.) beauv.), corn spurrey (spergula arvensis l.), goldenrod (sonchus sp.), italian ryegrass (lolium multiflorum l.), lamb's-quarters (chenopodium album l.), and quack grass (agropyron repens (l.) beauv.)) was examined in relation to the effect it had on the growth of the potato cultivar russet burbank. bacterial species composition and co ... | 2001 | 11766050 |
| reproduction of pratylenchus penetrans on 24 common weeds in potato fields in québec. | twenty-four weeds commonly found in commercial potato fields in quebec were evaluated for their host suitability to the root-lesion nematode, pratylenchus penetrans, under greenhouse conditions. brown mustard (brassica juncea) and rye (secale cereale) were included as susceptible controls and forage pearl millet hyb. cfpm 101 (pennisetum glaucum) as a poor host. pratylenchus penetrans multiplied well on 22 of the 24 weed species tested (pf/pi >/= rye or brown mustard). cirsium arvense, leucanthe ... | 2007 | 19259506 |
| legacy of historic ozone exposure on plant community and food web structure. | information on whole community responses is needed to predict direction and magnitude of changes in plant and animal abundance under global changes. this study quantifies the effect of past ozone exposure on a weed community structure and arthropod colonization. we used the soil seed bank resulting from a long-term ozone exposure to reestablish the plant community under a new low-pollution environment. two separate experiments using the same original soil seed bank were conducted. plant and arth ... | 2017 | 28796821 |
| ozone exposure of a weed community produces adaptive changes in seed populations of spergula arvensis. | tropospheric ozone is one of the major drivers of global change. this stress factor alters plant growth and development. ozone could act as a selection pressure on species communities composition, but also on population genetic background, thus affecting life history traits. our objective was to evaluate the consequences of prolonged ozone exposure of a weed community on phenotypic traits of spergulaarvensis linked to persistence. specifically, we predicted that the selection pressure exerted by ... | 2013 | 24086640 |
| clinical hypocalcaemia associated with yarr (spergula arvensis) ingestion. | | 2000 | 16032131 |
| evaluation of native plant flower characteristics for conservation biological control of prays oleae. | several studies have shown that manipulating flowering weeds within an agroecosystem can have an important role in pest control by natural enemies, by providing them nectar and pollen, which are significant sources of nutrition for adults. the aim of this study was to assess if the olive moth, prays oleae (bernard, 1788) (lepidoptera: praydidae), and five of its main natural enemies, the parasitoid species chelonus elaeaphilus silvestri (hymenoptera: braconidae), apanteles xanthostigma (haliday) ... | 2016 | 26780918 |
| selenium concentrations of common weeds and agricultural crops grown in the seleniferous soils of northwestern india. | the plants grown in seleniferous soils constitute a major source of toxic selenium levels in the food chain of animals and human beings. greenhouse and field experiments were conducted to study selenium concentrations of weeds, forages and cereals grown on seleniferous soils located between 31.0417 degrees to 31.2175 degrees n and 76.1363 degrees to 76.4147 degrees e in northwestern india. eleven winter season (november-april) weed plants were grown in the greenhouse in a soil treated with diffe ... | 2009 | 19800657 |