Submission

Alternaria alternata on Oryza sativa

Credits / Owner: Md. Azizul Hoque, Technical Manager, MNT Seed Testing Lab. (BDML0300), Lal Teer Seed Limited
Submission date: 2026-01-22 03:13:56
Submission ID: #189

<em>Alternaria alternata</em> on <em>Oryza sativa</em> — *Alternaria alternata* on *Oryza sativa*
*Image credits: Md. Azizul Hoque, Technical Manager, MNT Seed Testing Lab. (BDML0300), Lal Teer Seed Limited*
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Symptoms of Leaf blight or Leaf spot / Alternaria alternata on Oryza sativa

Pathogen

Scientific name	Alternaria alternata
Genus	Alternaria
EPPO code	ALTEAL
Common name	Leaf blight or Leaf spot
Synonyms	Alternaria tenuis
Crop	Oryza sativa

More about Alternaria alternata

Submission

Description

Morphological Description: Organism Identification: The specimen exhibits morphological characteristics consistent with the genus Alternaria. Spore Type: Multicellular conidia. Shape: Obclavate to pyriform (club-shaped) with a prominent apical beak (tapered end). Septation: The conidia are muriform, possessing both transverse and longitudinal septa. Arrangement: Spores are observed in catenulation (forming chains), connected by the beak of one spore to the base of the next. Coloration: Naturally pigmented (dematiaceous), showing a characteristic golden-brown to olivaceous hue.

Sterilant:	NA
Sterilant time:	NA
Growth time:	7 days
Lighting:	alternating 12 h darkness & 12 h light.
Agar:	Blotter Method
Sample origin:	Bangladesh