Fort Collins sugar beet germplasm evaluated for rhizomania and storage rot resistance in Idaho, 2023

Strausbaugh, C.A. and Vincill, E.D. and Majumdar, R. (2024) Fort Collins sugar beet germplasm evaluated for rhizomania and storage rot resistance in Idaho, 2023. Plant Disease Management Reports. 18:1-2. 27 November 2024.

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Abstract

Thirty sugar beet (Beta vulgaris L.) lines from the USDA-ARS Ft. Collins sugar beet program and five check cultivars were screened
for resistance to Beet necrotic yellow vein virus (BNYVV), the causal agent of rhizomania, and to storage rot. The rhizomania
evaluation was conducted at the USDA-ARS North Farm in Kimberly, ID which has Portneuf silt loam soil and had been in barley in
2022. The field was fall plowed with a Terrano chisel plow. In the spring the field was fertilized (115 lb N and 140 lb P2O5/A) and
roller harrowed on 10 Apr 23. The germplasm was planted (density of 114,048 seeds/A) on 2 May. The plots were one row 10-ft
long with 22-in. between-row spacing and arranged in a randomized complete block design with 6 replicates. The crop was managed
according to standard cultural practices for southern Idaho. The trial relied on endemic field inoculum for rhizomania and storage rot
development. The plots were rated for rhizomania foliar symptom (percentage of plants with yellow, stunted, upright leaves)
development on 7 Aug. The plants were mechanically topped and hand harvested on 16-17 Oct. At harvest, ten roots per plot were
rated for rhizomania symptom development using a scale of 0 to 9 (0 = healthy and 9 = dead; Plant Disease 92:581-587). At harvest,
eight roots per plot were also placed in a mesh-onion bag and kept in an indoor commercial storage facility (temperature set point
34°F) in Paul, ID on 18 Oct. On 11 Mar 24, after 145 days in storage, the roots were evaluated for the percentage of root surface area
covered by fungal growth or rot. Except for root ratings, data were analyzed in SAS (Ver. 9.4) using the general linear model (Proc
GLM) procedure, and Fisher’s protected least significant difference (α = 0.05) was used for mean comparisons. The root ratings were
analyzed in a nonparametric analysis as described by Shah and Madden (Phytopathology 94:33-43).

Item Type:	Article
Subjects:	Irrigated crops > Sugarbeet > Resistance Irrigated crops > Sugarbeet > Rhizomania Irrigated crops > Sugarbeet > Storage Irrigated crops > Sugarbeet
Depositing User:	Users 11 not found.
Date Deposited:	02 Dec 2024 20:20
Last Modified:	02 Dec 2024 20:20
Item ID:	1844
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1844