Beet curly top resistance in USDA-ARS Ft. Collins germplasm, 2017

Strausbaugh, C.A. and Fenwick, A.L. (2018) Beet curly top resistance in USDA-ARS Ft. Collins germplasm, 2017. Plant Disease Management Reports. 12(CF002). 12 March 2018.

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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, 49 sugar beet lines produced by the USDA-ARS Ft. Collins sugar beet program were screened in a disease nursery in 2017. The lines were arranged in a randomized complete block design with four replications. A curly top epiphytotic was created by releasing six viruliferous beet leafhoppers per plant at the four- to six-leaf growth stage on 14 June. Foliar symptoms were evaluated on 6 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, five entries (10, 16, 21, 34, and 46) performed the same as the resistant checks. These germplasm lines will be reevaluated for potential release to the general public so they can be utilized to improve BCTV resistance in commercial sugar beet cultivars.

Item Type:	Article
NWISRL Publication Number:	1611
Subjects:	Irrigated crops > Sugarbeet > Curly top Irrigated crops > Sugarbeet > Resistance Irrigated crops > Sugarbeet
Depositing User:	Users 6 not found.
Date Deposited:	13 Mar 2018 21:12
Last Modified:	26 Sep 2018 19:38
Item ID:	1654
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1654