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| Registros recuperados: 23 | |
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| Toda, T; Strausbaugh, C.A.; Rodriguez-Carres, M; Cubeta, M.A.. |
| Eighteen isolates sampled from sugar beet roots associated with an unknown etiology were characterized based on observations of morphological characters, hyphal growth at temperatures ranging from 4 to 28 C, production of phenol oxidases, and sequence analysis of internal transcribed spacer (ITS) and large subunit (LSU) regions of the ribosomal DNA (rDNA). The isolates did not produce asexual or sexual spores, had binucleate hyphal cells with clamp connections, grew from 4 to 22 C with and estimated optimal growth at 14.5 C, and formed a dark brown pigment on potato dextrose or malt extract agar amended with 0.5% tannic acid. Color changes observed when solutions of gum guiac, guiacol, and syringaldzine were applied directly to mycelium grown on these... |
| Tipo: Article |
Palavras-chave: Root rots; Storage; Sugarbeet; Fungi. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1443/1/1408.pdf |
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| Neher, Oliver T.; Strausbaugh, C.A.. |
| Bacterial root rot initiated by lactic acid bacteria, particularly Leuconostoc, occurs every year in Idaho sugarbeet fields. Hot fall weather seems to make the problem worse. Although Leuconostoc initiates the rot, other bacteria and yeast frequently invade the tissue as well. The acetic acid bacteria, particularly Gluconobacter, are what give the rotted tissue a fermented vinegar-like smell. The bacteria gain entry into the root through wounds caused by rodents, growth cracks, and fungal lesions such as those associated with Rhizoctonia root rot. No definite management practices for bacterial root rot in sugarbeet have been established, but minimizing problems with rodents and fungal root rots would be advisable. |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1530/1/1452.pdf |
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| Eujayl, Imad A.; Strausbaugh, C.A.. |
| The sugar beet industry is continuously undertaking major efforts to reduce postharvest sucrose losses. In Idaho sugarbeet roots may be stored indoors or outdoors for up to five months. Sugarbeet variety genetic make-up, pre-harvest field conditions, harvest practices, and post-harvest storage conditions can affect storability significantly. Physical root conditions and root health before deliv- ery to the pile contribute to the magnitude of sucrose losses. Growers chose different varieties for a certain season and may plant more than one variety in a field. This practice renders it difficult to collect information on the exact location of varieties in the field and storage piles. Additionally, it’s a daunting task to physically tag... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Genetics. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1361/1/1338.pdf |
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| Neher, Oliver T.; Strausbaugh, C.A.. |
| Root rot in storage can lead to considerable sucrose losses in storage and adversely affect factory processing as well. The use of fungicide treatments applied to the root surface prior to storage were investigated to determine if they could reduce storage rots caused by Botrytis sp., Penicillium sp., and Athelia sp. Roots of the sugar beet cultivar B-5 were produced using standard cultural practices. At harvest eight roots were placed in a mesh onion bags to establish experimental units. The study included nine fungicide treatments (applied as a root dip) and a non-treated check arranged in a randomized complete block design with four replications. Roots were then placed on top of an indoor commercial sugar beet pile and evaluated four times for root rot... |
| Tipo: Article |
Palavras-chave: Storage; Root rots; Sugarbeet. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1402/1/1372.pdf |
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| Eujayl, Imad A.; Strausbaugh, C.A.. |
| Rhizomania in the field and fungal root rot in storage can both lead to significant sucrose losses in sugar beet roots. In an effort to reduce these losses, sugarbeet germplasm developed by the USDA-ARS Kimberly sugarbeet program was evaluated for resistance to both these disease problems. Nine sugarbeet lines and four check cultivars were arranged in a randomized complete block design with six replications and grown in a field known to be infested with Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania. The plants were evaluated for foliar symptoms in July, August, and September. Plots were harvested in October, roots were evaluated for rhizomania root symptoms, and roots from each plot were also placed in a commercial indoor storage... |
| Tipo: Article |
Palavras-chave: Rhizomania; Root rots; Storage; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1510/1/1474.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.; Rearick, E.; Foote, P.. |
| Twenty-seven experimental sugar beet cultivars and five commercial check cultivars were evaluated in a sprinkler-irrigated sugar beet field near Kimberly, ID where sugar beet were grown in 2009. The field trial was conducted in a field that contained Portneuf silt loam soil and relied on natural infection for rhizomania development. The plots were planted on 26 Apr 10 to a density of 142,560 seeds/A, and thinned to 47,520 plants/A on 12 Jun. Plots were four rows (22-in. row spacing) and 24 ft long. The experimental design was a randomized complete block design with four replications per cultivar. The crop was managed according to standard cultural practices. The plants were mechanically topped and the center two rows were collected with a mechanical... |
| Tipo: Article |
Palavras-chave: Rhizomania; Root rots; Storage; Sugarbeet. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1493/1/1457.pdf |
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| Strausbaugh, C.A.; Panella, Leonard W.. |
| Rhizomania caused by the Beet necrotic yellow vein virus (BNYVV) is a worldwide problem that can lead to loss of tonnage and lower percent sucrose in the field. BNYVV can also reduce the storability of roots. To identify germplasm with resistance to these problems, 18 sugarbeet germplasm lines developed by the USDA-ARS Ft. Collins sugarbeet program and four check cultivars were screened in a field experiment arranged in a randomized complete block design with 6 replications. During the growing season plants were evaluated for foliar rhizomania symptoms. At harvest on 4 October 2012, roots were evaluated for rhizomania symptoms and then placed into an indoor commercial sugarbeet storage building in Paul, ID. Foliar symptoms ranged from 0% for resistant... |
| Tipo: Article |
Palavras-chave: Rhizomania; Root rots; Storage; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1509/1/1472.pdf |
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| Strausbaugh, C.A.; Panella, Leonard W.. |
| Rhizomania caused by the Beet necrotic yellow vein virus (BNYVV) is a worldwide problem that can lead to loss of tonnage and lower percent sucrose in the field. BNYVV can also reduce the storability of roots. To identify germplasm with resistance to these problems, 18 sugarbeet germplasm lines developed by the USDA-ARS Ft. Collins sugarbeet program and four check cultivars were screened in a field experiment arranged in a randomized complete block design with 6 replications. During the growing season plants were evaluated for foliar rhizomania symptoms. At harvest on 4 October 2012, roots were evaluated for rhizomania symptoms and then placed into an indoor commercial sugarbeet storage building in Paul, ID. Foliar symptoms ranged from 0% for resistant... |
| Tipo: Article |
Palavras-chave: Rhizomania; Root rots; Storage; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1561/1/1517.pdf |
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| Strausbaugh, C.A.; Neher, Oliver T.; Rearick, E.; Eujayl, Imad A.. |
| Root rots in sugar beet storage can lead to million dollar losses because of reduced sucrose recovery. Thus, studies were conducted to establish better chemical control options and a better understanding of the fungi involved in the rot complex. A water check and three fungicides (Mertect, Propulse, and Stadium) were investigated for their ability to control fungal rot on sugar beet roots held in long term storage during both the 2012 and 2013 storage seasons. At the end of September into October, roots were collected on five subsequent weeks, treated, and placed on top of a commercial indoor storage pile until early February. Both Propulse and Stadium performed well, by reducing fungal growth and rot on roots versus the check by an average of 84 to... |
| Tipo: Article |
Palavras-chave: Root rots; Storage; Sugarbeet. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1607/1/1565.pdf |
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| Strausbaugh, C.A.; Rearick, E.; Eujayl, Imad A.; Foote, P.. |
| The Rhizoctonia-bacterial root rot complex can lead to yield loss in the field but may also lead to problems with sucrose loss in storage. Thus, studies were conducted to investigate if placing sugarbeet roots suffering from root rot together with healthy roots could compromise the ability of the healthy roots to retain sucrose. Over a three year period, root samples from three commercial cultivars were compared in storage as a healthy (eight healthy roots) or rotted (eight healthy roots + one rotted root) treatment inside an outdoor storage pile. The experiment was arranged as a split block (healthy in one half of block and rotted in the other) with the whole blocks arranged in a randomized complete block design with four replications. Samples were... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Bacteria. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1484/1/1406.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.. |
| The Rhizoctonia-bacterial root rot complex on sugarbeet caused by Rhizoctonia solani and Leuconostoc mesenteroides can cause significant yield losses. To investigate the impact of different tillage systems on this complex, field studies were conducted from 2009 to 2011. Split blocks with conventional and strip tillage as main plot treatments were arranged in a randomized complete block design with four replications. Within main plots, there were seven treatments (non-inoculated check and six R. solani AG 2-2 IIIB strains). Regardless of tillage, the roots responded in a similar manner for fungal rot (conventional 8% versus strip 7%), bacterial rot (26% versus 34%), total rot (33% versus 41%), neighboring roots infected (1.7 roots versus 1.5 roots),... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Tillage. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1471/1/1436.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.. |
| The Rhizoctonia-bacterial root rot complex in sugarbeet caused by Rhizoctonia solani and Leuconostoc mesenteroides can cause significant yield losses. To investigate the impact of different tillage systems on this complex, field studies were conducted from 2009 to 2011. Split blocks with conventional and strip tillage as main plot treatments were arranged in a randomized complete block design with four replications. Within main plots, there were seven treatments (non-inoculated check and six R. solani AG-2-2 IIIB strains). Regardless of tillage, the roots responded in a similar manner for fungal rot (conventional 8% versus strip 7%), bacterial rot (26% versus 34%), total rot (33% versus 41%), neighboring roots infected (1.7 roots versus 1.5 roots),... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Bacteria. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1472/1/1437.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.; Panella, Leonard W.. |
| Rhizoctonia root rot caused by Rhizoctonia solani can cause serious economic losses in sugar beet fields. Preliminary evidence suggests there could be interactions between different strains and resistance sources. Thus, field studies were conducted to determine if nine R. solani AG-2-2 IIIB strains varied for virulence when compared with a non-inoculated check and interacted with five sugar beet lines (four resistant lines and a susceptible check). The studies were arranged in a randomized complete block design with six replications. Roots were evaluated for surface rot and internal fungal and bacterial rot in September. All strains were virulent on the susceptible check, FC901/C817, and had the same ranking (r = 1.0) regardless of disease variable.... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1505/1/1469.pdf |
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| Strausbaugh, C.A.. |
| Rhizoctonia root and crown is an important disease problem in sugar beet caused by Rhizoctonia solani and also shown to be associated with Leuconostoc. Since, the initial Leuconostoc studies were conducted with only a few isolates and the relationship of Leuconostoc with R. solani is poorly understood, a more thorough investigation was conducted. A total of 203 Leuconostoc isolates were collected from recently harvested sugar beet roots in southern Idaho and southeastern Oregon during 2010 and 2012: 88 and 85% L. mesenteroides, 6 and 15% L. pseudomesenteroides, 2 and 0% L. kimchi, and 4 and 0% unrecognized Leuconostoc sp., respectively. Based on 16S rRNA sequencing, haplotype 11 (L. mesenteroides isolates) comprised 68 to 70% of the isolates both... |
| Tipo: Article |
Palavras-chave: Rhizomania; Root rots; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1620/1/1577.pdf |
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| Strausbaugh, C.A.; Neher, Oliver T.; Rearick, E.; Eujayl, Imad A.. |
| Root rots in sugar beet storage can lead to multi-million dollar losses because of reduced sucrose recovery. Thus, studies were conducted to establish better chemical control options and a better understanding of the fungi involved in the rot complex. A water check and three fungicides (Mertect, Propulse, and Stadium) were investigated for their ability to control fungal rot on sugar beet roots held in long term storage during both the 2012 and 2013 storage seasons. At the end of September into October, roots were collected on 5 subsequent weeks, treated, and placed on top of a commercial indoor storage pile until early February. Differences (P <0.0001 to 0.0150) between spray treatments were evident with both Propulse and Stadium reducing fungal growth... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Fungi. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1581/1/1537.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.. |
| Rhizoctonia root rot continues to be a concerning problem in sugar beet production areas. To investigate resistance to this disease in 26 commercial sugar beet cultivars, field studies were conducted with three Rhizoctonia solani AG-2-2 IIIB strains. Based on means for the 26 cultivars, surface rot ranged from 0 to 96% depending on the strain-cultivar combination. Both the number of dead plants and root surface area rotted resulted in significant (P < 0.0002) cultivar differences. Based on Spearman’s rank correlation coefficient, there was always a significant relationship (P < 0.0390) when comparing cultivar performance across all three strains regardless of disease variable. The three most resistant cultivars performed well against all strains... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1483/1/1448.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.. |
| Rhizoctonia root rot continues to be a concerning problem in sugar beet production areas. To investigate resistance to this disease in 26 experimental sugar beet cultivars, field studies were conducted with three Rhizoctonia solani AG-2-2 IIIB strains. Based on means for the 26 cultivars, surface rot ranged from 0 to 93% depending on the strain-cultivar combination. Both the number of dead plants and root surface area rotted resulted in significant (P < 0.0004) cultivar differences. Based on Spearman’s rank correlation coefficient, there was always a significant relationship (P < 0.0279) when comparing cultivar performance across all three strains regardless of disease variable. The three most resistant cultivars performed well against all... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1527/1/1486.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.. |
| Rhizoctonia root rot continues to be a concerning problem in sugar beet production areas. To investigate resistance to this disease in 26 experimental sugar beet cultivars, field studies were conducted with three Rhizoctonia solani AG-2-2 IIIB strains. Based on means for the 26 cultivars, surface rot ranged from 0 to 93% depending on the strain-cultivar combination. Both the number of dead plants and root surface area rotted resulted in significant (P < 0.0004) cultivar differences. Based on Spearman’s rank correlation coefficient, there was always a significant relationship (P < 0.0279) when comparing cultivar performance across all three strains regardless of disease variable. The three most resistant cultivars performed well against all... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1482/1/1447.pdf |
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| Strausbaugh, C.A.. |
| Sugar beet root rots are not only a concern because of reduced yields, but can also be associated with losses in storage. Our primary sugar beet root rot disease problem in the Amalgamated production area is Rhizoctonia root rot. However, this rot frequently only penetrates a short distance past the surface of the root before a bacterial complex stops the fungus and continues the rot process. This rot complex leads to direct yield loss at harvest time along with additional costs in factory processing. When rotted roots make it into storage piles, they have been shown to compromise surrounding healthy roots. A recent end-of-harvest storage pile survey of 74 to 76% of the piles at receiving stations in Treasure Valley and Magic Valley has identified... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1539/1/1496.pdf |
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| Strausbaugh, C.A.; Eujayl, Imad A.; Foote, P.. |
| The Rhizoctonia-bacterial root rot complex continues to be a concerning problem in sugar beet production areas. To investigate resistance to this complex in 26 commercial sugar beet cultivars, field studies and greenhouse studies with mature roots from the field were conducted with Rhizoctonia solani AG-2-2 IIIB strains and Leuconostoc mesenteroides. Based on means for the 26 cultivars in the 2010 and 2011 field studies, fungal rot ranged from 0 to 8%, bacterial rot ranged from 0 to 37%, total rot ranged from 0 to 44%, and surface rot ranged from 0 to 52%. All four rot variables resulted in significant (P < 0.0001) cultivar differences. Based on regression analysis, strong positive relationships (r2 from 0.6628 to 0.9320; P < 0.0001) were present... |
| Tipo: Article |
Palavras-chave: Root rots; Sugarbeet; Bacteria. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1475/1/1440..pdf |
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| Registros recuperados: 23 | |
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