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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

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