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Beet curly top resistance in USDA-ARS plant introduction lines, 2014.

Strausbaugh, C.A. and Panella, Leonard W. (2015) Beet curly top resistance in USDA-ARS plant introduction lines, 2014. Plant Disease Management Reports. 9(FC091).

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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, twenty-four plant introduction (PI) lines were screened in a disease nursery in 2014. The lines were arranged in a randomized complete block design with three replications. A curly top epiphytotic was created by releasing approximately 6 viruliferous beet leafhoppers per plant at the four- to six-leaf growth stage on 23 Jun. Foliar symptoms were evaluated on 16 Jul 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. Five of the PIs were not significantly different from the resistant checks based on visual symptoms. Of these 5 PIs, two lines had very low virus titer as well. These promising lines will be retested and, if resistance is confirmed, they will be incorporated into the USDA-ARS sugar beet germplasm improvement program as potentially novel sources of resistance to BCTV.

Item Type: Article
NWISRL Publication Number: 1546
Subjects: Irrigated crops > Sugarbeet > Curly top
Irrigated crops > Sugarbeet > Resistance
Irrigated crops > Sugarbeet > Verticillium wilt
Depositing User: Dan Stieneke
Date Deposited: 08 Apr 2015 18:56
Last Modified: 08 Apr 2015 18:57
Item ID: 1588