Beet curly top resistance in USDA-ARS Kimberly germplasm, 2022

Eujayl, Imad A. and Galewski, Paul J. and Strausbaugh, C.A. (2023) Beet curly top resistance in USDA-ARS Kimberly germplasm, 2022. Plant Disease Management Reports. 17:1. 15 March 2023.

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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, 8 sugar beet lines produced by the USDA-ARS Kimberly sugar beet program were screened in a disease nursery in 2022. 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 15 Jun. Foliar symptoms were evaluated on 6 July using a scale of 0-9 (0 = healthy and 9 = dead). 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 of the entries contain at least some minor resistance since their ratings were lower than the susceptible checks. However, only three entries (KDH13, KDH-39/KDH13, and KDH4-9) were not significantly different from the resistant check. These three entries and the two others with minor resistance will be retested and investigated further 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:	1750
Subjects:	Irrigated crops > Sugarbeet > Curly top Irrigated crops > Sugarbeet
Depositing User:	Users 11 not found.
Date Deposited:	21 Mar 2023 17:07
Last Modified:	21 Mar 2023 17:07
Item ID:	1789
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1789