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Beet curly top resistance in USDA-ARS Plant Introductions, 2013

Strausbaugh, C.A. and Panella, Leonard W. (2014) Beet curly top resistance in USDA-ARS Plant Introductions, 2013. Plant Disease Management Reports. 8:FC171.

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Curly top caused by Curtovirus species 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, thirty Plant Introduction (PI) Lines were screened in a disease nursery in 2013. 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 27 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 check. Twelve of the PIs were not significantly different from the resistant control, HM PM90. Of these 12 PIs, three performed extremely well, one from Greece (PI546423) and two from Portugal (PI604524, PI604539). They will be retested and, if resistance is confirmed, they will be incorporated into the USDA-ARS germplasm improvement program as potentially novel sources of resistance to BSCTV and closely related Curtovirus species.

Item Type: Article
NWISRL Publication Number: 1492
Subjects: Irrigated crops > Sugarbeet > Curly top
Irrigated crops > Sugarbeet
Depositing User: Users 6 not found.
Date Deposited: 07 Apr 2014 15:18
Last Modified: 07 Apr 2014 15:18
Item ID: 1535