| regional and field-specific factors affect the composition of fusarium head blight pathogens in subtropical no-till wheat agroecosystem of brazil. | a multiyear survey of >200 wheat fields in paraná (pr) and rio grande do sul (rs) states was conducted to assess the extent and distribution of fusarium graminearum species complex (fgsc) diversity in the southern brazilian wheat agroecosystem. five species and three trichothecene genotypes were found among 671 fgsc isolates from fusarium head blight (fhb)-infected wheat heads: f. graminearum (83%) of the 15-acetyldeoxynivalenol (15-adon) genotype, f. meridionale (12.8%) and f. asiaticum (0.4%) ... | 2015 | 25121641 |
| fungal diversity and natural occurrence of deoxynivalenol and zearalenone in freshly harvested wheat grains from brazil. | this study investigated the fungal diversity and presence of deoxynivalenol and zearalenone in 150 samples of freshly harvested wheat grains collected in three regions of brazil (sao paulo, parana, and rio grande do sul). analysis of the mycobiota showed a predominance of alternaria sp., fusarium sp. and epicoccum sp. microdochium nivale (23%), a fungus rarely found in brazilian crops, was detected in sao paulo. four members of the fusarium graminearum species complex were isolated: f. graminear ... | 2016 | 26593513 |
| morphological and molecular characterization of fusarium spp pathogenic to pecan tree in brazil. | the occurrence of fusarium spp associated with pecan tree (carya illinoinensis) diseases in brazil has been observed in recent laboratory analyses in rio grande do sul state. thus, in this study, we i) obtained fusarium isolates from plants with disease symptoms; ii) tested the pathogenicity of these fusarium isolates to pecan; iii) characterized and grouped fusarium isolates that were pathogenic to the pecan tree based on morphological characteristics; iv) identified fusarium spp to the species ... | 2014 | 25501150 |
| molecular survey of trichothecene genotypes of fusarium graminearum species complex from barley in southern brazil. | fusarium head blight is a disease of primary concern to small-grain cereals of brazil, including barley. its main causal agent, fusarium graminearum species complex (fg complex)-© is able to produce mycotoxins, especially deoxynivalenol (don) and nivalenol (niv), that usually contaminate grain. strains that produce don may also produce its acetylated derivatives: 3-acetyl-don (3-adon) and 15-acetyl-don (15-adon). ninety two isolates were obtained from samplings of barley grain during three years ... | 2011 | 21665312 |
| mycotoxins and fungi in wheat stored in elevators in the state of rio grande do sul, brazil. | samples of wheat harvested from 1988 to 1990 and stored in elevators in the south of brazil (12 brazilian, 4 argentinian and 2 uruguayan) were analysed in 1990 for 14 mycotoxins: deoxynivalenol (don), nivalenol, diacetoxyscirpenol (das), t-2 and ht-2 toxins, t-2 triol, t-2 tetraol, aflatoxins b1, b2, g1, g2, ochratoxin a (ochra a), zearalenone and sterigmatocystin. one sample (1988 harvest) was contaminated with ochra a (0.04 microgram/g) and three other samples (1990 harvest) were contaminated ... | 1995 | 8522033 |