vs Needle Rust

Chrysomyxa abietis compared with Chrysomyxa ledi

Taxonomic Classification

Rank		Needle Rust
Kingdom same	Fungi (Pilze)	Fungi (Pilze)
Phylum same	Basidiomycota (Ständerpilze)	Basidiomycota (Ständerpilze)
Class same	Pucciniomycetes (Pucciniomycetes)	Pucciniomycetes (Pucciniomycetes)
Order same	Pucciniales (Rostpilze)	Pucciniales (Rostpilze)
Family same	Coleosporiaceae	Coleosporiaceae
Genus same	Chrysomyxa	Chrysomyxa
Species	Chrysomyxa abietis	Chrysomyxa ledi

Evolutionary Relationship

and Needle Rust share a common ancestor at the Genus level: Chrysomyxa.

Conservation Status

NE — Not Evaluated

Needle Rust

NE — Not Evaluated

Physical Characteristics

Attribute		Needle Rust
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Found across Europe (7 countries).

Needle Rust

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Found across Europe (6 countries) and North America (United States).

Chrysomyxa abietis is a macrocyclic rust fungus in the family Coleosporiaceae (Basidiomycota) that causes spruce needle rust disease on Norway spruce (Picea abies) and related conifers across Europe. The fungus completes its life cycle entirely on conifers, infecting current-year needles in spring through airborne urediniospores and aeciospores, causing yellowing, deformation, and premature needle drop. Infected spruce stands show characteristic orange-yellow stripe discoloration on young needles, affecting photosynthesis and tree vigor. The rust is widespread in central and northern Europe, including Belgium, Denmark, Hungary, Norway, Slovenia, and the broader boreal forest zone, wherever susceptible Picea hosts occur. Unlike many rust fungi, C. abietis does not require an alternate host (heteroecious cycle); it is autoecious, cycling between different spore stages on the same host genus. Heavy infections can weaken trees and increase their susceptibility to other stressors including bark beetles and drought. The fungus is not evaluated for conservation status by the IUCN, as it is classified as Not Evaluated. While typically a natural component of coniferous forest ecosystems, outbreaks may intensify under warmer, wetter springs that favor spore dispersal and infection.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇳🇴 Norway 🇸🇪 Sweden 🇬🇧 United Kingdom