| [factors influencing pathogenicity of collectotrichum gloeosporioides f.sp. veronicae to veronica persica]. | the effects of the characters of the fungus, the growing period of plants and environmental factors on the pathogenicity of colletotrichum gloeosporioides f.sp. veronicae infecting veronica persica were studied in pot experiments. the results showed that 1.08 x 10(8) spores.ml-1 suspension could kill the seedlings with two cotyledons within one week and cause old plants serious disease. 1 x 10(8) spores.ml-1 was optimal concentration and 1 or 2 weeks old was the best age of the spores for killin ... | 2002 | 12385213 |
| performance of potential non-crop or wild species under oecd 208 testing guideline study conditions for terrestrial non-target plants. | the inclusion of 52 potential non-crop or wild species in new oecd guidelines for terrestrial non-target plant (tntp) testing led to a ring test conducted by four laboratories experienced in regulatory testing. species selected had shown potential to meet validity criteria of emergence for tntp studies in a previous evaluation of the 52 species. oecd 208 guideline conditions were applied, with and without seed pretreatments recommended to enhance germination. these species were abutilon theophra ... | 2007 | 17171722 |
| discriminating crop, weeds and soil surface with a terrestrial lidar sensor. | in this study, the evaluation of the accuracy and performance of a light detection and ranging (lidar) sensor for vegetation using distance and reflection measurements aiming to detect and discriminate maize plants and weeds from soil surface was done. the study continues a previous work carried out in a maize field in spain with a lidar sensor using exclusively one index, the height profile. the current system uses a combination of the two mentioned indexes. the experiment was carried out in a ... | 2013 | 24172283 |
| responses of wild plant species to polycyclic aromatic hydrocarbons in soil. | responses of plants to polycyclic aromatic hydrocarbons (pahs) contamination were determined with fifty-five korean wild plants. responsiveness of species was evaluated based on germination and shoot weight and shoot length of plants grown in soil spiked with four pahs (pyrene, fluorene, phenanthrene and fluoranthene). seeds of test plants were germinated with mixtures of pahs of 0, 10, 30, 100, 300 mg kg(-1) spiked in soil. seed germination of test plants changed when subjected to pahs. as comp ... | 2009 | 19724837 |
| lamium amplexicaule (lamiaceae): a weed reservoir for tomato yellow leaf curl virus (tylcv) in korea. | after the first identification of tomato yellow leaf curl virus (tylcv) in the southern part of korea in 2008, tylcv has rapidly spread to tomato farms in most regions of korea. from 2008 to 2010, a survey of natural weed hosts that could be reservoirs of tylcv was performed in major tomato production areas of korea. about 530 samples were collected and identified as belonging to 25 species from 11 families. pcr and southern hybridization were used to detect tylcv in samples, and replicating for ... | 2014 | 24327090 |