Fescue

Foodplant / miner
larva of Agromyza nigrella mines leaf of Festuca

In Great Britain and/or Ireland:
Foodplant / spot causer
gregarious, with smoky-brown pore pycnidium of Ascochyta coelomycetous anamorph of Ascochyta graminicola causes spots on fading leaf of Festuca
Remarks: season: late summer

Plant / resting place / on
puparium of Cerodontha flavocingulata may be found on leaf of Festuca
Other: major host/prey

Plant / resting place / within
puparium of Cerodontha pygmaea may be found in leaf-mine of Festuca
Other: major host/prey

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

Foodplant / pathogen
Cladochytrium caespitis infects and damages rotten root of Festuca

Foodplant / saprobe
effuse colony of Cylindrotrichum dematiaceous anamorph of Cylindrotrichum oligospermum is saprobic on dead Festuca

Foodplant / feeds on
pycnidium of Ascochyta coelomycetous anamorph of Didymella phleina feeds on Festuca

Foodplant / parasite
colony of Drechslera dematiaceous anamorph of Drechslera festucae parasitises live Festuca

Foodplant / parasite
stroma of Epichlo parasitises stem of Festuca

Foodplant / pathogen
long stalked apothecium of Gloeotinia granigena infects and damages fallen seed of Festuca
Remarks: season: 5-7

Foodplant / pathogen
strand of Laetisaria fuciformis infects and damages dying plant of Festuca

Foodplant / pathogen
immersed, often in rows between veins pycnidium of Dilophospora coelomycetous anamorph of Lidophia graminis infects and damages live leaf of Festuca
Remarks: season: 5-10, esp. 7

Foodplant / saprobe
immersed pycnidial anamorph of Ophiosphaerella herpotricha is saprobic on stem internode (basal) of Festuca
Remarks: season: 3-7
Other: minor host/prey

Foodplant / open feeder
larva of Pachynematus obductus grazes on leaf of Festuca
Other: major host/prey

Foodplant / saprobe
immersed perithecium of Phomatospora berkeleyi is saprobic on dead stem of Festuca
Remarks: season: 2-9

Foodplant / feeds on
loosely gregarious, often hypophyllous, immersed, black, shining stroma (pycnidial) of Placosphaerella coelomycetous anamorph of Placosphaerella silvatica feeds on leaf of Festuca

Foodplant / saprobe
fruitbody of Psathyrella flexispora is saprobic on debris of Festuca

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

Foodplant / spot causer
immersed, minute pycnidium of Septoria coelomycetous anamorph of Septoria tritici senu Rob. & Desm. causes spots on leaf (between veins) of Festuca
Remarks: season: 5-8
Other: uncertain

Foodplant / saprobe
numerous, scattered or in short rows, immersed pycnidium of Stagonospora coelomycetous anamorph of Stagonospora subseriata is saprobic on dead stem of Festuca
Remarks: season: 4-5

Foodplant / pathogen
immersed stroma of Pseudocercosporella dematiaceous anamorph of Tapesia yallundae infects and damages live stem of Festuca

Foodplant / parasite
sorus of Urocystis ulei parasitises live leaf of Festuca