Incidence of Alternaria Species Associated with Watermelon Leaf Blight in Korea

Kwon, Oh-Kyu; Jeong, Aram; Jeong, Yong-Jik; Kim, Young-Ah; Shim, Jaekyung; Jang, Yoon Jeong; Lee, Gung Pyo; Park, Chang-Jin

doi:10.5423/ppj.oa.02.2021.0018

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Rodrigues et al [34] demonstrated that A. tomatophila was able to infect not only tomato but also potato plants, experimental inoculation tests showed brownish lesions on inoculated potato leaves. A. alternata has been identified to be pathogen causing citrus brown spot and watermelon leaf blight [35,36]. Its diseased symptoms on citrus are brown to black lesions surrounded by a yellow halo, and leaf drop if severely infected [35].…”

Section: Discussionmentioning

confidence: 99%

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A New Leaf Blight Disease Caused by Alternaria jacinthicola on Banana in China

et al. 2021

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A leaf blight disease with an incidence level of about 50% was found on Robusta banana in Guangdong province of China in September 2020. The early symptom appeared as pale gray to black brown, irregular, small, necrotic lesions mainly on the top 3–5 leaves. Severely infected leaves were withered and necrotic. Two representative fungus strains, strain L1 and strain L2, were isolated from affected banana leaves, and morphological and molecular identification analysis confirmed that the two fungi were both Alternaria jacinthicola. Many Alternaria species have been reported to cause wilting, decay, leaf blight and leaf spots on plants and lead to serious economic losses in their production, including A. alternata, causing leaf blight and leaf sport diseases on banana. The Koch’s postulates of A. jacinthicola causing the leaf blight disease was further fulfilled, which confirmed that it is the causal agent of this disease. To our knowledge, this is the first report of A. jacinthicola causing leaf blight on banana in China.

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Section: Discussionmentioning

confidence: 99%

“…Its diseased symptoms on citrus are brown to black lesions surrounded by a yellow halo, and leaf drop if severely infected [35]. In watermelon, A. alternata induced dark brown leaf spot lesions similar to the symptoms that appeared in citrus [36]. Moreover, it was reported that Alternaria species can infect more than one host plant [37].…”

Section: Discussionmentioning

confidence: 99%

A New Leaf Blight Disease Caused by Alternaria jacinthicola on Banana in China

et al. 2021

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Three Alternaria Species, Including a New Species, Causing Leaf Spot Disease of Loquat (Eriobotrya japonica) in China

Yan,

Yu,

Liang

et al. 2024

Plant Disease

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Loquat (Eriobotrya japonica) is an economically important subtropical fruit crop in China. Field surveys conducted in different loquat orchards located in Chongqing, Sichuan and Fujian province between 2017-2020 resulted in a collection of 56 Alternaria-like isolates from trees exhibiting symptoms of loquat leaf spot. Multigene phylogenetic analyses using seven gene regions, namely ITS, gapdh, RPB2, tef1, Alt a 1, endoPG and OPA10-2, showed that all the isolates belonged to the genus Alternaria, and supporting morphological analysis identified them as members of species A. alternata, A. gaisen and A. chongqingensis sp. nov. In vitro- and in vivo- pathogenicity tests showed all the identified species to be pathogenic and able to cause leaf spot disease on loquat. Moreover, comprehensive phylogenetic analyses employing all combinations of the above seven gene sequences revealed the capability of Alt a 1-tef1-endoPG to provide a well-resolved gene tree for Alternaria spp. at the species level. This study adds to the current knowledge on an unknown species (A. chongqingensis sp. nov.) and the first report of A. gaisen in loquat worldwide.

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Diagnostic Guide for Alternaria Leaf Spot on Sugar Beet, Red Beet, and Chard

Cortes

Hanson

Miles

et al. 2022

Plant Health Progress

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Alternaria leaf spot, caused by Alternaria spp., is a common foliar disease of sugar beet and other Beta vulgaris crop types. Known to be present in the US since at least the 1950s, this disease has been found in all major sugar beet growing regions of the US as well being reported as present everywhere beets are grown. Alternaria leaf spot symptoms are similar to several other common foliar diseases of beets including Cercospora leaf spot and the early stages of Phoma leaf spot. Symptoms and signs of this disease in the field do not provide enough information to help distinguish between diseases unless the viewer is readily familiar with the pathogen, especially when viewed with the unaided eye. Alternaria cultures can be identified to species using colony and conidial morphology on select culture media or using molecular markers. While not as common as Cercospora leaf spot, Alternaria leaf spot can result in significant reductions in yield and quality when not managed.

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Incidence of Alternaria Species Associated with Watermelon Leaf Blight in Korea

Cited by 3 publications

References 28 publications

A New Leaf Blight Disease Caused by Alternaria jacinthicola on Banana in China

A New Leaf Blight Disease Caused by Alternaria jacinthicola on Banana in China

Three Alternaria Species, Including a New Species, Causing Leaf Spot Disease of Loquat (Eriobotrya japonica) in China

Diagnostic Guide for Alternaria Leaf Spot on Sugar Beet, Red Beet, and Chard

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