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Evaluation of commercial sugarbeet hybrids for resistance to beet curly top in Canyon County, ID, 2004

Camp, S. and Foote, P. and Strausbaugh, C.A. and Gillen, A.M. (2005) Evaluation of commercial sugarbeet hybrids for resistance to beet curly top in Canyon County, ID, 2004. Biological and Cultural Tests for Control of Plant Diseases. 20:p. FC023. Available:

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The experiment was conducted in a commercial sprinkler-irrigated sugarbeet field near Nampa, ID in an area where
Beet curly top virus had been a problem in previous years. The field trial relied on natural infection and was planted on 19
Mar. The plots were planted to a density of 190,000 seeds/A, and thinned to 35,640 plants/A. Plots were four rows wide
(22 in-row spacing) and 36 ft long. The experimental design was a randomized complete block with eight replications.
The crop was managed by the grower according to standard cultural practices. The weather during the growing season was
cooler than normal. Disease data were recorded on 14 Sept by three raters using a disease index of 0 to 9 (no symptoms to
dead). The three ratings per plot were averaged prior to analysis. The center two rows were harvested on 20 Oct using a
small plot harvester. The sugar content of the beets was determined by the Amalgamated Sugar Co. laboratory, and the
recoverable sugar (lb/A) was estimated. Data were analyzed using the general linear models procedure (Proc GLM-SAS),
and Fisher's Protected LSD was used for mean comparisons.
Yields were above average and disease pressure was uniform and moderately severe. The commercial hybrids response
to Beet curly top virus ranged from acceptable (slight leaf curl to most leaves with moderate curling) to severely affected
(most larger leaves becoming prostrate). Analysis of variance indicated there were significant differences among hybrids for
diseases index, root yield, sugar content, and estimated recoverable sugar. Our disease ratings positively correlated (r s =
0.913, P < 0.0001) with those from the 04 Curly Top Nursery in Kimberly, ID. Based on Spearman's Coefficient of Rank
Correlation (rs = -0.737, P < 0.0001), there was an inverse relationship between estimated recoverable sugar and disease

Item Type: Article
NWISRL Publication Number: 1151
Subjects: Irrigated crops > Sugarbeet > Resistance
Irrigated crops > Sugarbeet > Curly top
Depositing User: Users 3 not found.
Date Deposited: 24 Mar 2008 21:06
Last Modified: 25 Oct 2016 17:53
Item ID: 1214