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| Registros recuperados: 13 | |
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| Strausbaugh, C.A.; Gallian, J.J.; Camp, S.; Foote, P.; Gillen, A.M.. |
| Curly top of sugarbeets caused by Beet curly top virus (BCTV) was widespread from southeastern Oregon to southcentral Idaho in 2004. Curly top first became a serious threat to sugarbeet production in southern Idaho in 1919. By the time the first resistant variety was released in 1935, BCTV had almost eliminated the sugarbeet industry (2). Today this disease is largely managed through the use of resistant varieties. Early planting and the use of systemic insecticides (phorate, aldicarb, and imidicloprid) will also help limit curly top (1,2,4). |
| Tipo: Conference or Workshop Item |
Palavras-chave: Curly top. |
| Ano: 2005 |
URL: http://eprints.nwisrl.ars.usda.gov/958/1/1166.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.. |
| Twenty-five experimental sugarbeet hybrids submitted to the official variety trials were evaluated for resistance to Beet curly top virus (BCTV). Hybrids were planted in a commercial sprinkler-irrigated sugarbeet field and exposed to a natural epiphytotic of BCTV. Experimental units were arranged in a randomized complete block design with seven replications. Plots were evaluated for BCTV based on a Disease Index (DI) scale of 0 to 9 (no symptoms to dead) on Sept 14, 2004 by three raters. The moderately severe epiphytotic resulted in uniform disease pressure and significant differences between hybrids for DI, root yield, sugar content, and estimated recoverable sugar. Our disease ratings were positively correlated with (r = 0.632, P < 0.0001)... |
| Tipo: Article |
Palavras-chave: Resistance; Curly top. |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/1221/1/1193.pdf |
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| Gillen, A.M.; Bliss, F.A.. |
| An F2 population from a single F1 plant from the cross of peach [Prunuspersica (L.) Batsch] rootstock cultivars Harrow Blood (HB) x Okinawa (Oki) was used to locate the Mi locus, which conditions resistance to Meloidogyne incognita (race 1) (Kofoid and White) Chitwood. These data and comparison of common markers among published genetic linkage maps placed the Mi locus on Prunus L. linkage group 2. Two restriction fragment length polymorphisms (RFLPs) [linked at 4.8 and 6.8 centimorgan (cM), repulsion phase] and one random ampli?ed polymorphic DNA (RAPD) marker (linked at 9.5 cM, coupling phase) were linked to Mi. The RAPD marker was cloned, sequenced, and converted to a polymerase chain reaction (PCR)-based cleaved ampli?ed polymorphic sequence (CAPS)... |
| Tipo: Article |
Palavras-chave: Mass Import - unclassified. |
| Ano: 2005 |
URL: http://eprints.nwisrl.ars.usda.gov/15/1/1160.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.. |
| Commercial sugar beet hybrids were evaluated for resistance to Beet severe curly top virus in a furrow-irrigated sugar beet field near Ontario, OR where curly top had been a problem in previous years. The field trial relied on natural infection and was planted on 6 Apr. Plots were planted to a density of 285,120 seeds/A, and thinned to 40,731 plants/A. Plots were four rows wide (22 in. between rows) and 23 ft long. The experimental design was a randomized complete block with eight replications. The crop was managed according to standard cultural practices. The weather during the growing season was normal except for above average temperatures in Mar and Aug and above average precipitation in Apr and May. Disease pressure was uniform and moderately... |
| Tipo: Article |
Palavras-chave: Resistance; Curly top. |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/1222/1/1194.pdf |
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| Gillen, A.M.; Strausbaugh, C.A.; Gallian, J.. |
| Thirty-one sugar beet germplasm breeding lines and releases produced by the USDA-ARS sugarbeet program at Salinas, CA, and one line from the USDA-ARS sugarbeet program at East Lansing, MI, were evaluated for resistance to rhizomania under south-central Idaho conditions at Twin Falls, ID. The field had been identified as having Beet necrotic yellow vein virus (BNYVV), which overcomes resistance conditioned by the Rzl gene. Single-row plots 10 ft long with 22-in. spacing were planted on 23 May 05. Plants were thinned to 4 to 6-in. spacing in mid-Jun. The materials were predominantly multigerm; they were hand thinned to single plants during the first week of Jul. The trial layout was a randomized complete block with eight replicates, however, the... |
| Tipo: Article |
Palavras-chave: Resistance; Rhizomania. |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/1226/1/1207.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.. |
| Root rot in sugar beet (Beta vulgaris) causes significant losses worldwide. To assess the distribution of root rot fungi and their relationship to bacterial root rot,commercial sugarbeet roots with rot symptoms were collected at harvest time in the Intermountain West. Isolations for both fungi and bacteria were conducted using standard microbiological techniques, and the root area rotted was assessed. A subset of fungal isolates was tested for pathogenicity to sugar beet in greenhouse assays and field trials with and without manure. In the field survey of rotting beets, the fungi most frequently associated with root rot included Fusarium spp. (Fusariumoxysporum and Fusarium acuminatum with 24% and 15% of isolates, respectively), Geotrichum spp. (16%... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1334/1/1311.pdf |
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| Strausbaugh, C.A.; Gillen, A.M.; Camp, S.; Shock, C.C.; Eldredge, E.P.; Gallian, J.J.. |
| Sugar beet (Beta vulgaris) varieties were evaluated for disease resistance to curly top to establish if disease ratings made in inoculated nurseries correlated with disease ratings and yield in sugar beet crops exposed to natural disease outbreaks. Cultivars were planted both in inoculated curly top nurseries in Kimberly, ID, and in commercial cultivar trials in irrigated fields near Ontario, OR and Nampa, ID. Plants were evaluated for curly top using a rating scale of 0 (no symptoms) to 9 (dead). Moderate disease pressure in the Ontario (mean rating = 3.8) and Nampa (mean rating = 4.1) fields resulted in significant differences for disease rating, root yield, sugar content, and estimated recoverable sugar among cultivars. Disease ratings from both... |
| Tipo: Article |
Palavras-chave: Curly top. |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/67/1/1231.pdf |
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| Gillen, A.M.; Strausbaugh, C.A.; Tindall, K.V.. |
| Curly top of sugarbeet is caused by Beet severe curly top virus (BSCTV) or closely related curtovirus species which are vectored by the beet leafhopper (Circulifer tenellus). Beta corolliflora, shown in 1969 to impart a very high level of curly top resistance to sugarbeet into the BC2 generation, is a wild relative of cultivated sugarbeet that has not been utilized in breeding programs. The nature of curly top resistance from B. corolliflora seems to be reduced symptoms and resistance to viral accumulation. Field screening of 14 B. corolliflora accessions for resistance to curly top followed by PCR detection of BSCTV did not identify any accessions with phenotypic symptoms of curly top and 9 accessions did not have detectable virus. Clip cage... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1320/1/1297.pdf |
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| Registros recuperados: 13 | |
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