| wheat antixenosis, antibiosis, and tolerance to infestation by delphacodes kuscheli (hemiptera: delphacidae), a vector of "mal de río cuarto" in argentina. | "mal de rio cuarto", is the most important virus disease of corn, zea mays l., in argentina. it is caused by the mal de rio cuarto virus (family reoviridae, genus fijivirus. mrcv), which is a persistent virus transmitted by delphacodes kuscheli (fennah 1955) (hemiptera: delphacidae). because corn is not a natural host of d. kuscheli, it has little protection from this pest. in contrast, wheat, triticum aestivum l., is one of the main hosts of this vector and a reservoir of mrcv. the aim of this ... | 2009 | 19886444 |
| biocontrol and pgpr features in native strains isolated from saline soils of argentina. | a bacterial collection of approximately one thousand native strains, isolated from saline soils of cordoba province (argentina), was established. from this collection, a screening to identify those strains showing plant growth promotion and biocontrol activities, as well as salt tolerance, was performed. eight native strains tolerant to 1 m: nacl and displaying plant growth promotion and/or biocontrol features were selected for further characterization. strains mep(2 )18, mrp(2 )26, mep(2 )11a, ... | 2007 | 17700983 |
| molecular diversity of ecologically distinct mal de río cuarto virus isolates based on restriction fragment length polymorphism (rflps) and genome sequence analysis of segments 1, 7, 9 and 10. | viruses of the species mal de río cuarto virus (genus fijivirus, family reoviridae) cause significant economic losses in maize in argentina. genetic changes in the virus genome leading to better adaptation to diverse ecological conditions were postulated that would account for the increasing mrcv variability. the genomic differences between mrcv isolates from four ecologically different areas (río cuarto, rc; pergamino, p; jesús maría, jm; and tafí del valle, tv) were studied. rt-pcr-amplified f ... | 2007 | 17370108 |
| occurrence of ochratoxin a-producing fungi in commercial corn kernels in argentina. | potentially ochratoxigenic aspergillus and penicillium species were identified and the natural occurrence of ochratoxin a (ota) in corn kernels was evaluated. likewise, the capacity to produce ota by aspergillus section nigri and circumdati was investigated. a total of 50 corn samples for human consumption was collected in the south of córdoba province. the surface-disinfected method for mycobiota determination was used. the ota detection was performed by hplc. ota production was tested in strai ... | 2006 | 16389485 |
| maize and oat antixenosis and antibiosis against delphacodes kuscheli (homoptera: delphacidae), vector of "mal de rio cuarto" of maize in argentina. | "mal de rio cuarto" (mrc) is the most important virus disease of maize, zea mays l., in argentina. several maize lines show different levels of resistance to mrc in the field; however, no studies have been conducted to investigate resistance mechanisms against its insect vector, delphacodes kuscheli fennah (homoptera: delphacidae). oat, avena spp., is the main overwintering host of d. kuscheli and main source of populations that infest maize. although oat varieties resistant to the greenbug, sch ... | 2005 | 16156593 |
| aspergillus section flavi populations from field maize in argentina. | populations of aspergillus section flavi were studied from a commercial field of maize in río cuarto, córdoba, argentina. | 2002 | 11967056 |
| genetic variation in fusarium section liseola from no-till maize in argentina. | strains of fusarium species belonging to section liseola cause stalk and ear rot of maize and produce important mycotoxins, such as fumonisins. we isolated two species, fusarium verticillioides (gibberella fujikuroi mating population a) and fusarium proliferatum (g. fujikuroi mating population d) from maize cultivated under no-till conditions at five locations in the córdoba province of argentina. we determined the effective population number for mating population a (n(e)) and found that the n(e ... | 2000 | 11097907 |