Taphrina tosquinetii

The affected shoots curl and become sticky, the leaves on them grow and shrink, covered with large flat or convex-concave brown spots.

The mycelium develops under the cuticle, wintering in the kidneys.

The marsupial layer (" hymenia ") is grayish, develops on both sides of the leaves.

Eight -spore asks, 20–49 × 5–14 microns in size, cylindrical with a rounded or truncated apex, develop between the cells of the epidermis of the plant. Basal cells ( see Tafrin's article ) 7-19 × 6-16 microns, elongated, taper down.

Ascospores are ellipsoidal or rounded, 2.5–5.5 × 2.5–5 μm, often budded in the asks.

Sporulation is observed in May - September.

During artificial cultivation, the formation of ascogenous cells and asks was observed in this species.

It affects black alder ( Alnus glutinosa ). Usually young shoots are infected in the lower part of the crown, less often at a height of up to 6-7 meters. Infected shoots die out in 1-2 seasons, sometimes they last up to 10-12 years.

Taphrina tosquinetii is distributed in the central , northern and eastern regions of Europe and in North America .

• Taphrina japonica is distinguished by the absence of basal cells and larger asci; it is found in the Far East and North America.

• Karatygin I.V. Tafrin, Protomycium, Exobazidium, Microstromacy orders. - SPb. : “Science”, 2002. - P. 30. - (Key to mushrooms in Russia). - ISBN 5-02-026184-X .