Golovinomyces asperifolii (Eriksson) Braun & Shin, 2018

on Buglossoides, Echium, Myosotis

Golovinomyces asperifolii: powdery mildew on Myosotis sp.

Myosotis sp., Dronten © Arnold Grosscurt

parasite

mycelium conspicuous, white, amphigenous, generally persistent. Conidia in chains, elliptic, without fibrosin bodies. Conidia 12-20 x 22–38 µm, length/width ratio 1.4–2.4. Conidiophores up to 250 mm, basal septum usually 5–25 mm above the junction with the mother cell. Cleistothecia with 5-20 asci that contain 2-4 spores. Appendages numerous, attached on and below the equator. They are up to 2 x as long as the diameter, flaccid, hyaline or brown below and paler or colorless towards the tip, septate, generally unbranched.

host plants

Boraginaceae, oligophagous

Buglossoides arvensis & subsp. sibthorpiana; Echium angustifolium, candicans, creticum, italicum & subsp. biebersteinii, lusitanicum, parviflorum, plantagineum, rosulatum, sabulicola, tuberculatum, vulgare & subsp. pustulatum; Myosotisalpestris, arvensis, decumbens, discolor, laxa & subsp. baltica + caespitosa, nemorosa, ramosissima, scorpioides, sparsiflora, stricta, sylvatica.

notes

See the note about the Golovinomyces cynoglossi complex.

references

Braun, Bradshaw, Zhao ao (2018a).

mod 6.x.2018