Blumeria americana

Ciri dan struktur

The fungus forms thick mycelial growth on the leaves of its hosts, which soon becomes pigmented, greyish-orange or brownish-orange to rusty brown. The mycelium is formed from late spring or early summer to August. Secondary mycelium is said to be dingy greyish-white to grey. When present, the chasmothecia are often densely packed. As with most Erysiphaceae, Blumeria americana is fairly host-specific, having been most frequently recorded from Elymus, along with Leymus, Hordeum, Pascopyrum, Psathyrostachys, and Apera. However, many of these genera more commonly host other species of Blumeria (such as Hordeum with Blumeria hordei). The type host of Blumeria americana is Elymus repens – this species hosts Blumeria graminis in Eurasia (and potentially also in North America). Blumeria americana can be found only in North America, in any habitats where its host species can be found. The primary mycelium occurs in parallel with the secondary mycelium. It is effuse or typically in patches, at first white, becoming pigmented, greyish-orange or brownish-orange to rusty brown. The secondary mycelium is dense, appearing woolly to felt-like. It occurs on the leaf in patches, often around chasmothecia. It is coloured dingy greyish white to grey. The hyphal appressoria are described as nipple-, lobe-, or fork-shaped, occurring either singly or opposite in pairs. Conidia are broad and ellipsoid-ovoid. Secondary conidia can be lemon-shaped. Conidiophores are single or in pairs, with a swollen foot-cell characteristic of the genus. They can be branched or unbranched, with a basal septum at the junction with the mother cell or elevated up to 10 μm high.

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Rujukan: [1]

Pengukuran mengikuti objek, spesimen atau kultur, dan metode yang disebutkan sumber. Baca uraian asli untuk konteks lengkap.

Habitat dan peran ekologis

Blumeria americana is a species of powdery mildew in the family Erysiphaceae. It is found in North America where it infects multiple genera of plants in the family Poaceae (grasses), mainly in the tribe Triticeae, with one host in the Poeae.

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Rujukan: [1]

Habitat atau konteks temuan

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Substrat

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Peran atau konteks

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Reproduksi

The primary mycelium occurs in parallel with the secondary mycelium. It is effuse or typically in patches, at first white, becoming pigmented, greyish-orange or brownish-orange to rusty brown. The secondary mycelium is dense, appearing woolly to felt-like. It occurs on the leaf in patches, often around chasmothecia. It is coloured dingy greyish white to grey. The hyphal appressoria are described as nipple-, lobe-, or fork-shaped, occurring either singly or opposite in pairs. Conidia are broad and ellipsoid-ovoid. Secondary conidia can be lemon-shaped. Conidiophores are single or in pairs, with a swollen foot-cell characteristic of the genus. They can be branched or unbranched, with a basal septum at the junction with the mother cell or elevated up to 10 μm high.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

Catatan identitas dan cakupan

• Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
• Original geographic, specimen and life-cycle scope retained; source import awaits individual editorial review.
• Impor dan terjemahan otomatis belum diperiksa editorial per profil. Struktur reproduktif yang disebutkan tidak membuktikan seluruh siklus hidup diketahui.
• Pengukuran pada uraian mengikuti spesimen, kultur, dan metode sumber; angka tidak diperluas ke semua populasi.

Melihat dengan konteks

Dokumentasi Blumeria americana menurut asosiasi foto pada record takson iNaturalist. Kredit: Zihao Wang. Identitas mengikuti sumber; bukan penentuan spesimen independen.

Jenis

Fotografi

Kredit

(c) Zihao Wang, some rights reserved (CC BY), uploaded by Zihao Wang

Lisensi

CC BY 4.0

Sumber media

Buka entri sumber

Gambar menunjukkan objek menurut identifikasi sumber, bukan verifikasi independen spesimen oleh Fungi. Tidak ada skala baru yang ditambahkan.

Sumber profil

1. [1] Blumeria americana — Wikipedia (en)Bagian sumber: Frozen revision 1371241955
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Blumeria americanaBagian sumber: ColDP NameUsage.tsv ID 9YZJ8; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Blumeria americanaBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY 4.0 · (c) Zihao Wang, some rights reserved (CC BY), uploaded by Zihao Wang