Leveillula jaczewskii U. Braun

Khodaparast, Seyed Akbar, Takamatsu, Susumu, Shadlou, Adel, Damadi, Mohsen, Pirnia, Mahdi & Jahani, Mahdi, 2016, Notes on the genus Leveillula (Erysiphaceae): a new unrecorded species and notes on Leveillula infecting Ficus, Cucurbita and Tropaeolum in Iran, Phytotaxa 260 (3), pp. 267-275 : 269-270

Leveillula jaczewskii U. Braun , Taxonomic Manual of the Erysiphales (Powdery Mildews) 11: 195 (2012)

Mycelium on living stems and leaves, amphigenous, may covers whole plant stems surface; plants bush being completely white; hyphae 2.5–4.5 μm; primary conidia, broadly lanceolate, ovoid-sublanceolate, to subcylindrical with parallel side, sometimes constricted in the middle, apically rounded to sometimes pointed, base rounded or truncate, 41– 68×14–20 μm, length/wide ratio 3.2–4.4; secondary conidia ellipsoid-cylindric, to subclavate, occasionally somewhat constricted in the middle, base truncate or rounded, 47–68×15–20 μm; chasmothecia subgregarious to scattered, immersed in dense mycelial tomentum, 173–227 μm, peridial cells obscure, irregularly shaped; appendages in the lower half, mycelioid, poorly developed to developed, simple to irregularly branched, without septa, hyaline, thinwalled, 4–8 μm; asci numerous, up to 45, stalked, stalk ca. 10–20 μm, ellipsoid, ovoid, 78–98×26–35 μm, 2-spored; ascospores, ellipsoid, 30–40×15–23 μm ( Figs. 2 , 3 ).

Specimen examined. IRAN, Khorasan-e shomail Province, Bojnord, on Dodartia orientalis L., 25 Sep 2014, A. Shadlou (GUM 717).

Notes: — D. orientalis is a perennial weed invasive to crops such as grains, cotton, alfalfa and occurs in irrigation canals. Heavily infection on this plant may get attention to who are interesting for biocontrol of this weed.

Figures

FIGURE 2. Leveillula jaczewskii (A) Ascoma (B) part ofascomata with appendages, (C) Asci, (D) ascospores. Scale bar: A=100 μm, B, C=50 μm, D=20 μm.

FIGURE 3. Leveillula jaczewskii (A) primary conidia (B) secondary conidia. Scale bare =50 μm.