First Report of Curvularia oryzae Causing Leaf Spot of Coconut Seedling in China

Xu, Gang; Qiu, F.; Zhou, Jia; Zheng, F. Q.; Zheng, Lianwen; Miao, Weiguo; Xie, Changping

doi:10.1094/pdis-08-19-1575-pdn

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…A new leaf spot was reported from Hainan region of China observed long oval or irregular black to brown lesions with distinct yellow halo. The morphological and molecular data revealed the identity of the fungus as Diaporthe limonicola (Xu et al 2020). Alternaria leaf spot recorded from Allahabad region, showed symptoms throughout the year and which was observed as olive buff coloured circular to oval spots which later turned to blackish brown due to the fructification.…”

Section: Leaf Spot Diseases Of Arecanutmentioning

confidence: 93%

“…have been reported from various parts of the coconut growing countries, where it is a problem especially in coconut seedlings and the severity is dependent on season. Different species are reported to be associated with the spot disease in coconut, such as C. eragrostidis, C. lunata, C. oryzae (Xu et al 2020), C. pseudobrachya (Lekete et al 2022). In China, the leaf spot caused by C. oryzae showed initial symptoms as water stained chlorotic spots which later progressed to form almost round, long oval, occasionally irregular with dark greyish white centre, brown edges and distinguishable yellow halo (Xu et al 2020).…”

Section: Leaf Spot Diseases Of Coconutmentioning

confidence: 99%

“…Different species are reported to be associated with the spot disease in coconut, such as C. eragrostidis, C. lunata, C. oryzae (Xu et al 2020), C. pseudobrachya (Lekete et al 2022). In China, the leaf spot caused by C. oryzae showed initial symptoms as water stained chlorotic spots which later progressed to form almost round, long oval, occasionally irregular with dark greyish white centre, brown edges and distinguishable yellow halo (Xu et al 2020). The disease become serious in poorly drained neglected gardens and also nurseries established in heavy shade.…”

Section: Leaf Spot Diseases Of Coconutmentioning

confidence: 99%

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Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

Jayarajan,

K.K.,

et al. 2024

JMycR

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Coconut and arecanut are two important plantation crops (palms) of the tropical region. Throughout the growth period, the palms are affected by different diseases from root to fruit. Among which Leaf spot and Leaf blight diseases are observed in all palm cultivated areas. The severity of the diseases depends on favourable conditions and nutritional status of the garden. However, the drastic change in climate caused serious impact on the distribution of the leaf spot diseases. Previously minor diseases like Leaf spot of arecanut (Colletotrichum species and Phyllosticta species) and Lasiodiplodia leaf blight of coconut are becoming lethal in different locations. Regular monitoring and integrated disease management approach is the key to keep the disease in check. An attempt is being made in the present review paper to summarize the different leaf blight and spot diseases affecting coconut and arecanut.

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Section: Leaf Spot Diseases Of Arecanutmentioning

confidence: 93%

Section: Leaf Spot Diseases Of Coconutmentioning

confidence: 99%

Section: Leaf Spot Diseases Of Coconutmentioning

confidence: 99%

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Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

Jayarajan,

K.K.,

et al. 2024

JMycR

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“…The ceiba_1_/ceiba_2_ isolates from Cocos nucifera from Ghana showed 100% similarity with isolate (MH819562.1) of Curvularia pseudobrachyspora from Bulb Rot of Lily from China and 99.81% similarity with isolate (NR164423.1) of C. pseudobrachyspora from Areca palm leaf spots from Hainan Province, China [15] respectively. Surprisingly, ceiba 1 and ceiba 2 which were coconut isolates from Ghana, showed distinct characteristics from Curvularia oryzae strain (CBS169.53) which was isolated and identified causing leaf spot disease on coconut seedlings in China [16].…”

Section: Molecularmentioning

confidence: 94%

First Report of Curvularia pseudobrachyspora Causing Leaf Spots Disease on Coconut (Cocos nucifera L.) Seedlings in Ghana

Lekete¹,

Osekre²,

Andoh-Mensah³

2022

AJPS

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Coconut (Cocos nucifera L.) is an important oilseed and a multipurpose perennial plantation crop. It is mostly grown in humid and coastal areas of Ghana. In June 2019, leaf spot disease was observed on coconut seedlings in 10 coconut growing Districts in Ghana. The Initial symptoms appeared as elliptical, brown-dark-red lesions, 4 -6 mm on affected leaves. Lesions reached 2.0 cm and gradually developed into spindly, dark brown spots with a light tan centre. A study including survey and laboratory work was carried out to assess disease prevalence and to identify the causal agent of the disease on coconut seedlings, in order to formulate effective management strategies against it. A total of 250 symptomatic leaves were picked from ten selected Districts for laboratory analysis. Additionally, the ribosomal internal transcribed spacer (ITS) region and glyceraldehyde 3-phosphate dehydrogenase (GAPDH) of the isolated pathogen were amplified using ITS1 and ITS4, gpd1 and gpd2 primers respectively. The disease incidence peaked at 95%. Fungal colonies on PDA grew to 50 -70 mm in diameter in one week at a temperature of 28˚C ± 1˚C with an even to undulating, immersed striated, mycelium; aerial mycelium being dark velvety green and sometime woolly-cottony. Acervuli formed on the aerial mycelium and contained black powderish conidial masses. Hyphae characteristics were similar to that of Curvularia pseudobrachyspora.Pathogenicity tests were done following Koch's postulate. For molecular confirmation, the combined ITS (MT075719) and GAPDH (MT075720) sequences were compared with published sequences of 52 Curvularia isolates and eight Bipolaris isolates using phylogenetic analysis. This is the first report of C. pseudobrachyspora as a causal agent of leaf spot on coconut seedlings in Ghana and possibly Africa but the pathogen has been reported on other crops in China, Florida and India.

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Curvularia verruculosa as new causal pathogen of common bean leaf spot disease in China

et al. 2022

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First Report of Curvularia oryzae Causing Leaf Spot of Coconut Seedling in China

Cited by 3 publications

References 5 publications

Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

First Report of <i>Curvularia pseudobrachyspora</i> Causing Leaf Spots Disease on Coconut (<i>Cocos nucifera</i> L.) Seedlings in Ghana

Curvularia verruculosa as new causal pathogen of common bean leaf spot disease in China

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First Report of Curvularia oryzae Causing Leaf Spot of Coconut Seedling in China

Cited by 3 publications

References 5 publications

Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

Scenario of fungal leaf spot and leaf blight diseases in coconut and arecanut

First Report of &lt;i&gt;Curvularia pseudobrachyspora&lt;/i&gt; Causing Leaf Spots Disease on Coconut (&lt;i&gt;Cocos nucifera&lt;/i&gt; L.) Seedlings in Ghana

Curvularia verruculosa as new causal pathogen of common bean leaf spot disease in China

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First Report of <i>Curvularia pseudobrachyspora</i> Causing Leaf Spots Disease on Coconut (<i>Cocos nucifera</i> L.) Seedlings in Ghana