| molecular and pathogenic variation within melampsora on salix in western north america reveals numerous cryptic species. | in north america, melampsora rusts that parasitize willows (salix species) have never been adequately studied and have mostly been referred to a collective species, melampsora epitea (kunze & schm.) thüm, of european origin. even taxa that are nominally distinct from m. epitea, such as m. abieti-caprearum and m. paradoxa, are currently considered to be 'races' of m. epitea. within the range of our field surveys and collections in the pacific northwest and southwest, only two species of melampsor ... | 2011 | 21558505 |
| molecular and morphological characterization of the willow rust fungus, melampsora epitea, from arctic and temperate hosts in north america. | current taxonomy places all rust fungi that occur on willow (salix spp.) in north america in one species complex, melampsora epitea thüm. characteristics of m. epitea isolates from the canadian arctic were compared to m. epitea isolates from temperate regions of north america. sequences from internal transcribed spacer (its) regions of rdna were obtained from urediniospores from rust-infected salix leaves collected in the canadian arctic and in minnesota and compared. phylogenetic analysis of nu ... | 2004 | 21148956 |
| tolylfluanide + tebuconazole in the control of some ornamental foliage diseases. | in the control of sphaerotheca pannosa var. rosae on rose tolylfluanide + tebuconazole (folicur multi 50 wg at concentration 0.1%) was used for spray 2 -times at 14-day-intervals or 4-times at 7-day-intervals. after 4 weeks of plants protection effectiveness of tested product was about 75%. in the control of diplocarpon rosae, the product was applied when first disease symptoms appeared on rose shrubs. application was repeated 5-times at 14-day-intervals or 9-times at 7-day-intervals. after 9 we ... | 2005 | 16637183 |
| chitosan (biochikol 020 pc) in the control of some ornamental foliage diseases. | chitosan, (biochikol 020 pc) a potential elicitor of plant defence and also an active inhibitor of fungal growth was used in experiments. the compound was used at concentrations 0.01 to 0.2% as a plant spray for rose protection against sphaerotheca pannosa var. rosae, peronospora sparsa and diplocarpon rosae, oidium chrysanthemi and puccinia horiana on chrysanthemum, against melampsora epitea on willow. myrothecium roridum on dieffenbachia and against lophodermium spp on scots pine. effectivenes ... | 2004 | 15756862 |
| oils activity against melampsora epitea on willow. | willow trees cv. iwa growing in open field conditions in the sandy soil and naturally infected with melampsora epitea were used. effectiveness of paraffin oil (atpolan 80 ec) and plant oils (olejan 85 ec, rape and sunflower) in the control of pathogen was evaluated. when first uredinia were seen on the lower leaf surface, plants were sprayed 2-times at 7-day intervals with tested compounds at concentration from 0.25 to 2%. also surfactant tergitol (tm) 15-s-9 at conc. 0.3% was added to plant oil ... | 2004 | 15756861 |
| falcon 460 ec in the control of foliage diseases of some ornamentals. | falcon 460 ec (167 g tebuconazole + 250 g spiroxamine + 43 g triadimenol per 1 dm3) at concentration 0.1%, applied as spray 4-times at 7-day intervals, was used in the control of sphaerotheca pannosa var. rosae on rose. after 4 weeks of plants protection effectiveness of the tested product was more than 92%. in the control of diplocarpon rosae, falcon 460 ec was applied when the first disease symptoms appeared on rose shrubs. the product application was repeated 9 times at 7-day intervals. effec ... | 2006 | 17390861 |