Plant Disease (2021) 105, p. 702 (Gaire et al.)

S.-P. Gaire, X.-G. Zhou and Y.-K. Jo (2021)
Sterile white basidiomycete fungus Marasmius graminum: A new pathogen causing seedling blight in rice
Plant Disease 105 (3), 702-702
Abstract: During 2018, rice seedlings (Oryza sativa) grown in three fields of Texas and Louisiana were observed with damping-off symptoms. Infected seedlings showed dark-brown necrotic lesions on the roots and/or mesocotyls where white superficial mycelium was usually present. About 10 to 20% of the seedlings showing the symptoms. The fungus Marasmius graminum was isolated from the diseased plants. The identification was based on morphological characteristics and DNA sequence analysis. Pathogenicity of the isolates was demonstrated by inoculation and re-isolation. No fruiting bodies or sclerotia were produced on PDA, indicating that the fungus belongs to the sterile white basidiomycetes.
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Database assignments for author(s): Young-Ki Jo

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Marasmius graminum	Rice (Oryza)	U.S.A. (mid S)