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Transgenic sugar beet cultivars evaluated for rhizomania resistance and storability in Idaho, 2007

Strausbaugh, C.A. and Eujayl, Imad A. and Rearick, E. and Foote, P. (2008) Transgenic sugar beet cultivars evaluated for rhizomania resistance and storability in Idaho, 2007. Plant Disease Management Reports. 2:FC106. 21 July 2008.

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Thirty-two transgenic (glyphosate resistant) and six conventional commercial sugar beet cultivars were evaluated in
a commercial sprinkler-irrigated sugar beet field near Rupert, ID where winter wheat was grown in 2006. The field trial
relied on natural infection for rhizomania development. The plots were planted on 3 Apr 07 to a density of 142,560 seeds/A,
and thinned to 47,520 plants/A on 23 May. 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 entry. The crop was managed according to
standard cultural practices. The roots were mechanically topped and the center two rows were collected with a mechanical
harvester on 26 Sep. At harvest the roots were evaluated for rhizomania (using a scale of 0-9, 0 = healthy and 9 = dead).
The percent sucrose at harvest was established based on two 8-root samples from each plot. The samples were submitted to
the Amalgamated Tare Lab (determined percent sucrose, conductivity, nitrates, and tare). At harvest, eight roots per plot
were also placed in a mesh onion bag, weighed, and placed in an indoor commercial sugar beet storage facility on 27 Sep 07
set to hold 35°F. On 1 Feb 08, the roots were evaluated for the percentage of surface area covered by fungal growth (an
undescribed basidiomycete that correlates with sucrose loss in storage). On 4 Mar 08 roots were retrieved after 160 days in
storage and evaluated for weight and percent sucrose (via gas chromatography). To establish percent reduction in sucrose at
harvest versus storage only samples from the same plots were compared. Data were analyzed using the general linear models
procedure (Proc GLM-SAS), and Fisher’s protected least significant difference was used for mean comparisons.

Item Type: Article
NWISRL Publication Number: 1263
Subjects: Irrigated crops > Sugarbeet
Depositing User: Users 6 not found.
Date Deposited: 13 Aug 2008 20:26
Last Modified: 19 Oct 2016 18:50
Item ID: 1286