First Report of Alternaria Leaf Spot Caused by <i>Alternaria tenuissima</i> on Sugar Beet (<i>Beta vulgaris</i>) in Minnesota, U.S.A.

Khan, Mohamed F. R.; Haque, M. E.; Bloomquist, Mark; Bhuiyan, M. Z. R.; Brueggeman, Robert; Zhong, Shaobin; Poudel, Roshan Sharma; Gross, Theresa A.; Hakk, P.; Leng, Yueqiang; Liu, Y.

doi:10.1094/pdis-03-19-0603-pdn

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…The maximum prices from root fresh weights were significantly obtained by applications Salama (35942, 37426 and 39023 L.E/fad) followed by Faten and Sahar cultivars in the 2019/2020, 2020/2021 and 2021/2022 seasons in respectively, with significant differences among them. These outcomes follow the same pattern as those attained by (Shalaby et al, 2011;Juriši et al, 2021 andKhan et al, 2020).…”

Section: Root Fresh Weight (Le/fad)supporting

confidence: 67%

Response assessment of some sugar beet (Beta vulgaris L.) cultivars to organic fertilizers treatments under South Sinai conditions

Abdelaziz

2023

Journal of Plant Production Sciences

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Sugar beet is considered the leading crop in the arid sugar field in Egypt, and the main goal of this study is to increase the production of sugar varieties in those areas with efficiency, especially since its cultivation is still the most suitable for the region. To achieve this goal, a research experiment was conducted in the development area in South Sinai Governorate for four varieties of sugar beets (Casupia -Salama -Sahar -Faten) with three applications of organic fertilization (0, 5, 10 tons/fad). The experiment was carried out in a split plot design, with a randomized complete block system with four replications, for three agricultural seasons (2019/2020, 2020/2021, and 2021/2022). Field data was taken for 16 morphological and productive characters of sugar beets as indicators to detect the level of productivity under the conditions of the ecosystem of the Al-Tur region in South Sinai. The results of the experiment resulted in the Salama variety being significantly superior to the other studied varieties by 8.5%. It also became clear that organic fertilization had a significant impact on facilitating the absorption of elements and reducing salt stress, considering that under organic fertilization rates, the Salama variety gave the highest productivity with organic fertilization at a rate of 10 ton/fad, and productivity increased by 167% over the variety, Casupia without using organic fertilization. Accordingly, the study recommended the need to use the Salama variety under organic fertilization conditions at a rate of 10 ton/fad, which contributes to improving sustainable sugar beet production in the Al-Tur region, South Sinai, Egypt, and places with comparable ecological characteristics.

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Section: Root Fresh Weight (Le/fad)supporting

confidence: 67%

Response assessment of some sugar beet (Beta vulgaris L.) cultivars to organic fertilizers treatments under South Sinai conditions

Abdelaziz

2023

Journal of Plant Production Sciences

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“…Similarly, in sugar beet, A. tenuissima manifested as dark brown circular or irregular spots on otherwise healthy plants. Initially, these lesions remained confined within specific parallel leaf veins [ 26 ]. In the context of amaranth, A. alternata emerged as one of the primary microorganisms responsible for infections and seed discoloration [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

Fonseca-Guerra,

Beltrán Pineda,

Benavides Rozo

2023

JoF

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Alternaria is a saprophytic and opportunistic fungus with a worldwide distribution that can affect the quality of various agricultural products, such as fruits, cereals, and pseudocereals. This research was carried out to investigate the population of this genus associated with quinoa cultivation in plots located in the Boyacá department (Colombia), the country’s third-largest quinoa-producing department. The present study found 17 Alternaria isolates, of which 13 were identified as A. alternata and 4 as A. scrophulariae (formerly A. conjuncta) employed molecular markers of internal transcribed spacer (ITS) region and translation elongation factor 1α (TEF-1α). In the pathogenicity test under greenhouse conditions, all the Alternaria isolates showed some degree of pathogenicity on Piartal quinoa cultivar plants although no significant differences were found in isolates. The severity indices ranged from 2 to 5, and the percentage of affected leaves per plant ranged between 15% and 40%. This fungus affected the foliar tissue of quinoa, resulting in chlorotic and necrotic spots, symptoms that can generate a reduction in the quality and productivity of crops. This is the first time that the pathogenicity of Alternaria spp. in the Piartal variety has been described and the first report of this genera in quinoa crops of Colombia.

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“…It was of little importance in the sugar beet crop in the US but nowadays, it has drawn the attention of the growers and researchers due to the increased incidence and severity of this pathogen since 2010. Recently, A. tenuissima and A. alternata were reported to cause leaf spots on sugar beet in Minnesota and North Dakota, respectively [4,23]. The most common method for controlling Alternaria diseases is the use of fungicides both in fields and in storages of various economic plants [15,13,16,2].…”

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confidence: 99%

In Vitro and In Vivo Pathogenicity of A. alternata to Sugar beet and Assessment of Sensitivity to Fungicides

Haque

Parvin

2022

Preprint

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A. alternata is a weak and opportunistic pathogen, but recently this pathogen has been reported in major sugar beet growing regions in the US. Therefore, we were interested to investigate the in-vitro and in-vivo pathogenesis of A. alternata to sugar beet seed, seedlings, tissue slices, stecklings, and roots. The in-vitro study demonstrated that A. alternata reduces seed germination, causes damping-off of seedlings, and decomposes beet tissue. The in-vivo study showed the same inoculum responsible for Alternaria leaf spots, and black circular spots on beetroot. Furthermore, we did a preliminary study to determine in vitro sensitivities of some fungicides to determine the effective concentration that inhibited 50% of radial mycelial growth (EC50 values) of A. alternata. The results indicated that EC50 values ranged from 0.0023 to 0.0058 for PROLINE, from 0.0004 to 0.0021 for OMEGA, and from 0.0027 to 0.0053 for Super TIN. Among the potential fungicides, the efficiency of quinone outside inhibitors (QoI- PRIAXOR) was relatively higher to inhibit the radial growth of A. alternata, irrespective of concentrations.

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First Report of Alternaria Leaf Spot Caused by Alternaria tenuissima on Sugar Beet (Beta vulgaris) in Minnesota, U.S.A.

Cited by 7 publications

References 3 publications

Response assessment of some sugar beet (Beta vulgaris L.) cultivars to organic fertilizers treatments under South Sinai conditions

Response assessment of some sugar beet (Beta vulgaris L.) cultivars to organic fertilizers treatments under South Sinai conditions

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

In Vitro and In Vivo Pathogenicity of A. alternata to Sugar beet and Assessment of Sensitivity to Fungicides

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