07/Sep/25, 3:08 PM
Kloostrimetsa soo õpperada, Tallinn, Harjumaa, Eesti
Deciduous boggy forest, infecting Poaceae sp. leaf
59°28'00.8"N 24°53'23.1"E
🌡️ 22°C 🌥️🌫️ Partly sunny, upcoming dense fog from the sea
Original Instagram postPuccinia recondita
brown rust of wheat
- Scientific identification
- Puccinia recondita Roberge ex Desm.
- Family
- Pucciniaceae
- Class
- Pucciniomycetes
- Genus
- Puccinia
Names across languages
- English: brown rust of wheat
- German: Roggenbraunrost
- Finnish: Rastin-rukiinruoste
- Estonian: Pruunrooste
- Russian: Пукциния неясная
The scientific profile
From the latest record: 2025-09-07.
Hymenium
Rheemata of rust pustules on host leaves (uredinia, telia) with sori breaking through the epidermis; internal hyphae intercellular, forming haustoria in host tissues
Morphology
No cap; symptoms appear as yellowish to brown spots or pustules (rust sori) on leaves; pustules may be brownish and powdery
Ecology
Obligate plant pathogen; heteroecious (requires alternate hosts), macrocyclic (has all typical rust life cycle stages: pycniospores, aeciospores, urediniospores, teliospores, basidiospores), primary hosts are cereals (wheat, rye) and some grasses
Edibility
Edibility inapplicable
Dimensions
Sorus size: pustules generally small—visible on leaves
Description
Germination of urediniospores requires free moisture
Microscopy
Spores: Different spore types:
Description
Aeciospores: 21-26 × 17-22 µm, broadly ellipsoid to spherical, hyaline.
Description
Urediniospores: 24-32 × 20-25 µm, yellow to cinnamon-brown, often finely echinulate (spiny) walls.
Description
Teliospores: Two-celled, long clavate when mature, 40-58 × 17-25 µm, brown.
Overview
Rust fungus infecting cereals and grasses (especially wheat, rye), causing brownish pustules on leaves and serious disease
1857). Bull. Soc. Bot. Fr. 4: 798.
Field encounters
Source hashtags
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