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| Strausbaugh, C.A.; Eujayl, I.A.. |
| Curly top caused by Beet curly top virus is a widespread disease problem vectored by the beet leafhopper in semiarid sugar beet production areas. Host resistance is the primary defense against this problem, but resistance in commercial cultivars is only low to intermediate. In order to identify novel sources of curly top resistance, 14 sugar beet lines were screened in a disease nursery in 2015. The lines were arranged in a randomized complete block design with six replications. A curly top epiphytotic was created by releasing six viruliferous beet leafhoppers per plant at the four-to six-leaf growth stage on 24 Jun. Foliar symptoms were evaluated on 13 and 20 Jul using a scale of 0-9 (0 = healthy and 9 = dead) in a continuous manner. Curly top... |
| Tipo: Article |
Palavras-chave: Curly top; Resistance; Sugarbeet. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1616/1/1573.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.. |
| Rhizomania caused by Beet necrotic yellow vein virus (BNYVV) and storage losses are serious sugar beet production problems. To investigate the influence of BNYVV on storability, six sugar beet cultivars varying for resistance to BNYVV were grown in 2005 and 2006 in southern Idaho fields with and without BNYVV infested soil. At harvest, samples from each cultivar were placed in an outdoor pile as a randomized complete block design with 4 reps in Twin Falls, ID and were removed on 40-day intervals starting the end of October. After 144 and 142 days in storage, sugar reduction across cultivars averaged 20 and 13% without and 68 and 21% with BNYVV for the 2005 and 2006 roots, respectively. In the December samplings, frozen root area was 1 and 2% without... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1277/1/1254.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.; Rearick, E.; Foote, P.. |
| Rhizomania caused by Beet necrotic yellow vein virus (BNYVV) and storage losses are serious sugar beet production problems. To identify sugar beet cultivars with resistance to BNYVV and evaluate storability, 22 commercial cultivars were screened by growing them in a commercial sugar beet field naturally infested with BNYVV in Declo, ID during the 2009 growing season in a randomized complete block design with 4 replications. At harvest on 13 October 2009, roots were dug and evaluated for symptoms of rhizomania and also placed in an indoor commercial sugar beet storage building. Storage samples were evaluated for fungal growth known to correlate with sucrose loss. Depending on cultivar, surface fungal growth ranged from 5 to 42% by 18 February 2010. Overall,... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1396/1/1368.pdf |
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| Teran, H.; Strausbaugh, C.A.; Eujayl, I.A.; Beaver, J.; Miklas, P.N.; Singh, S.. |
| Crop losses can be severe when susceptible large-seeded Andean dry and green bean cultivars are planted early in dry areas with a history of curly top caused by Beet curly top virus (BCTV) and closely related species. In order to assess the level of curly top resistance in 65 diverse dry and green bean genotypes, seed was planted in a commercial field in Kimberly, ID in 2007. Viruliferous beet leafhoppers were released approximately 3 weeks after emergence to generate an artificial epiphytotic. Plants were rated on a scale of 1-5 (1 = healthy, 5 = highly susceptible) 5 weeks after infestation and verified at fully developed pod stage (R8). Capri and UI 51 were among the most susceptible genotypes, while A 429, DOR 390, DOR 500, and G 2402 did not... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1278/1/1255.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.; Rearick, E.; Foote, P.. |
| Thirty-four experimental sugar beet cultivars and five commercial check cultivars were evaluated in a commercial sprinkler-irrigated sugar beet field near Declo, ID where winter wheat was grown in 2008. The field trial relied on natural infection for rhizomania development. The plots were planted on 20 Apr 09 to a density of 142,560 seeds/A, and thinned to 47,520 plants/A on 8 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 harvester on 13 Oct. At harvest the roots were... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1397/1/1367.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.; Foote, P.. |
| Pest feeding and vectoring of viruses cause serious problems in sugarbeet production worldwide. In order to ameliorate pest and disease problems on sugarbeet, two seed treatments, Poncho Beta (60 g a.i. clothianidin + 8 g a.i. beta-cyfluthrin/100,000 seed) and Cruiser Tef (60 g a.i. thiamethoxam + 8 g a.i. tefluthrin/100,000 seed) were investigated (the neonicotinoid was tested alone in some trials). The two seed treatments and an untreated check were tested in a series of eight field trials from 2006 to 2008 along with various commercial sugarbeet cultivars in a randomized complete block design with eight replications per trial. Natural pest incidence and curly top symptoms were evaluated. Both Poncho Beta and Cruiser Tef provided significant reduction... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1319/1/1296.pdf |
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| Strausbaugh, C.A.; Eujayl, I.A.. |
| Controlling curly top in sugarbeet has been industry priority in the western United States since the 1920s. Curly top is a virus disease that is vectored by the beet leafhopper. If the beet leafhopper moves into commercial fields early in the season, virus is more likely to be transmitted to sugarbeet plants at an early growth stage. However, the plants are more susceptible to the virus at early growth stages. Thus even if the plants contain host resistance, they sustain considerable damage if infected at an early growth stage. In order to supplement host resistance insecticide seed treatments were investigated previously and proven to be effective under low to moderate disease pressure. In the current study under high disease pressure (6... |
| Tipo: Article |
Palavras-chave: Curly top; Sugarbeet. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1486/1/1450.pdf |
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