مرجية قصبية

Foodplant / miner
solitary larva of Agromyza rondensis mines leaf of Calamagrostis

Foodplant / saprobe
colony of Arthrinium dematiaceous anamorph of Arthrinium phaeospermum is saprobic on dead leaf of Calamagrostis
Remarks: season: esp. 7-8

Foodplant / miner
larva of Cerodontha muscina mines leaf of Calamagrostis
Other: major host/prey

Foodplant / spot causer
stromatic acervulus of Cheilaria coelomycetous anamorph of Cheilaria agrostidis causes spots on live leaf of Calamagrostis

Plant / resting place / within
puparium of Chromatomyia nigra may be found in leaf-mine of Calamagrostis

Foodplant / saprobe
apothecium of Crocicreas culmicola is saprobic on dead stem of Calamagrostis
Remarks: season: 7-9

Foodplant / parasite
stroma of Epichlo parasitises stem of Calamagrostis
Remarks: season: fertile in 8

Foodplant / saprobe
apothecium of Lachnum controversum is saprobic on dead stem of Calamagrostis
Remarks: season: 5-10

Foodplant / saprobe
scattered, initially immersed pseudothecium of Leptosphaeria culmifraga is saprobic on dead stem of Calamagrostis
Remarks: season: spring, summer

Foodplant / saprobe
effuse colony of Periconia dematiaceous anamorph of Periconia hispidula is saprobic on dry, dead leaf of Calamagrostis
Remarks: season: 1-12

Foodplant / saprobe
scattered, initially immersed pseudothecium of Phaeosphaeria fuckelii is saprobic on dead stem of Calamagrostis
Remarks: season: spring, summer

In Great Britain and/or Ireland:
Foodplant / saprobe
scattered, initially immersed pseudothecium of Phaeosphaeria luctuosa is saprobic on dead stem of Calamagrostis
Remarks: season: spring, summer
Other: minor host/prey

Foodplant / saprobe
pycnidium of Hendersonia coelomycetous anamorph of Phaeosphaeria vagans is saprobic on dead stem of Calamagrostis

Foodplant / parasite
Puccinia graminis f.sp. epigaei parasitises Calamagrostis

Foodplant / spot causer
immersed, thin, subcuticular stromatic plates of Rhynchosporium coelomycetous anamorph of Rhynchosporium orthosporum causes spots on live sheath of Calamagrostis

Foodplant / spot causer
long, linear, erumpent sorus of Ustilago corcontica causes spots on live, blistered leaf of Calamagrostis

Foodplant / parasite
embedded sorus of Ustilago scrobiculata parasitises live Calamagrostis