Skip to main content

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

Strausbaugh, C.A. and Gillen, A.M. and Camp, S. and Foote, P. (2005) Evaluation of experimental sugarbeet hybrids for resistance to beet curly top in Canyon County, ID, 2004. Biological and Cultural Tests for Control of Plant Diseases. 20:p. FC015. Available:

[img] PDF

Download (31kB)


Experimental sugarbeet hybrids were evaluated for resistance to Beet curly top virus in a commercial sprinkler irrigated
sugarbeet field near Nampa, ID where beet curly top 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 design with seven replications. The crop was managed by the grower according to standard cultural
practices. The weather during the growing season was cooler than normal and disease pressure was uniform and
moderately severe. 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
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 moderately severe. The experimental hybrids response to Beet
curly top virus ranged from acceptable (slight leaf curl to most leaves with moderate curling) to moderately affected (severe
leaf curling). Analysis of variance indicated there were significant differences among hybrids in disease index, root yield,
sugar content, and estimated recoverable sugar. Disease index for hybrids in this test were positively correlated (r s = 0.632,
P < 0.0001) with ratings from the 04 Curly Top Nursery in Kimberly, ID. Based on Spearman's Coefficient of Rank
Correlation (rs = -0.15, P = 0.4651), there was no correlation between estimated recoverable sugar and disease index. This
lack of correlation between estimated recoverable sugar and disease index was likely not related to variation associated with
the disease rating but rather due to other factors such as field and genetic variation that influenced yield.

Item Type: Article
NWISRL Publication Number: 1152
Subjects: Irrigated crops > Sugarbeet > Resistance
Irrigated crops > Sugarbeet > Curly top
Depositing User: Users 3 not found.
Date Deposited: 24 Mar 2008 21:07
Last Modified: 25 Oct 2016 17:53
Item ID: 1215