Beet curly top resistance in USDA-ARS Ft. Collins germplasm, 2019

Strausbaugh, C.A. and Dorn, K.M. and Fenwick, A.L. (2020) Beet curly top resistance in USDA-ARS Ft. Collins germplasm, 2019. Plant Disease Management Reports. 14:p. CF043. 9 March 2020.

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Abstract

Curly top caused by Beet curly top virus (BCTV) 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, 30 sugar beet lines produced by the USDA-ARS Ft. Collins sugar beet program were screened in a disease nursery in 2019. 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 3 Jul. Foliar symptoms were evaluated on 22 July using a scale of 0-9 (0 = healthy and 9 = dead) in a continuous manner. Curly top symptom development was uniform and no other disease problems were evident in the plot area. The disease pressure in the test was moderately severe with good symptom development in the susceptible checks. Based on the visual rating, entries 9 and 27 were not significantly different from the resistant checks. These germplasm lines will be reevaluated for potential release to the general public so it can be utilized to improve BCTV resistance in commercial sugar beet cultivars.

Item Type:	Article
NWISRL Publication Number:	1667
Subjects:	Irrigated crops > Sugarbeet > Genetics Irrigated crops > Sugarbeet > Resistance Irrigated crops > Sugarbeet
Depositing User:	Users 6 not found.
Date Deposited:	09 Mar 2020 16:22
Last Modified:	09 Mar 2020 16:22
Item ID:	1708
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1708