Broom

Foodplant / miner
larva of Agromyza johannae mines leaf of Cytisus scoparius
Other: major host/prey

Foodplant / gall
larva of Apion atratulum causes gall of young stem of Cytisus scoparius
Other: major host/prey

Foodplant / internal feeder
larva of Apion fuscirostre feeds within pod of Cytisus scoparius
Other: sole host/prey

Foodplant / gall
larva of Apion immune causes gall of young stem of Cytisus scoparius
Other: sole host/prey

In Great Britain and/or Ireland:
Foodplant / parasite
Arnaudiella genistae parasitises Cytisus scoparius

Foodplant / sap sucker
nymph of Asciodema obsoleta sucks sap of Cytisus scoparius

Foodplant / miner
larva of Bruchidius cisti mines pod wall of Cytisus scoparius

Foodplant / feeds on
adult of Bruchidius villosus feeds on pollen of Cytisus scoparius
Remarks: season: late 4

Foodplant / open feeder
larva of Calomicrus circumfusus grazes on leaf of Cytisus scoparius

Foodplant / saprobe
erumpent pycnidium of Camarosporium coelomycetous anamorph of Camarosporium spartii is saprobic on dead branch of Cytisus scoparius

Foodplant / feeds on
pycnidium of Coniothyrium coelomycetous anamorph of Coniothyrium sarothamni feeds on Cytisus scoparius

Plant / resting place / on
adult of Cryptocephalus bipunctatus may be found on Cytisus scoparius
Remarks: season: 4-late 8

Plant / resting place / on
adult of Cryptocephalus sexpunctatus may be found on Cytisus scoparius
Remarks: season: 5-7

Foodplant / miner
larva of Cryptolestes spartii mines dead branch of Cytisus scoparius

Foodplant / saprobe
densely gregarius, plurilocular stroma of Cytospora coelomycetous anamorph of Cytospora sarothamni is saprobic on branch (rather thick) of Cytisus scoparius
Remarks: season: 2-4

Foodplant / saprobe
fruitbody of Dacrymyces minor is saprobic on decayed wood of Cytisus scoparius

Foodplant / sap sucker
nymph of Dictyonota fuliginosa sucks sap of bush (old, many podded) of Cytisus scoparius

Foodplant / sap sucker
nymph of Dictyonota strichnocera sucks sap of Cytisus scoparius

Foodplant / feeds on
pycnidium of Diplodia coelomycetous anamorph of Diplodia saccardiana var. anglica feeds on Cytisus scoparius

Foodplant / feeds on
pycnidium of Diplodia coelomycetous anamorph of Diplodia sarothamni feeds on Cytisus scoparius

Plant / associate
Dryophilus anobioides is associated with Cytisus scoparius

Foodplant / saprobe
effuse colony of Endophragmiella dematiaceous anamorph of Endophragmiella lignicola is saprobic on rotten wood of Cytisus scoparius

Foodplant / parasite
conidial anamorph of Erysiphe trifolii parasitises live Cytisus scoparius

Foodplant / saprobe
fruitbody of Flammulina velutipes var. velutipes is saprobic on dead wood of Cytisus scoparius
Remarks: season: mainly winter

Foodplant / feeds on
Gonioctena olivacea feeds on Cytisus scoparius

Foodplant / feeds on
Heterocordylus genistae feeds on Cytisus scoparius
Other: minor host/prey

Foodplant / feeds on
nymph of Heterocordylus tibialis feeds on Cytisus scoparius
Other: major host/prey

Foodplant / gall
larva of Hexomyza sarothamni causes gall of twig of Cytisus scoparius
Other: sole host/prey

Foodplant / internal feeder
larva of Hylastinus obscurus feeds within cambium of Cytisus scoparius

Foodplant / feeds on
larva of Odontothrips cytisi feeds on live flower of Cytisus scoparius
Remarks: season: 6

Foodplant / feeds on
Orthotylus adenocarpi feeds on patchily white leaf (young) of Cytisus scoparius
Other: major host/prey

Foodplant / feeds on
Orthotylus concolor feeds on patchily white leaf (young) of Cytisus scoparius
Other: major host/prey

Foodplant / feeds on
Orthotylus virescens feeds on patchily white leaf (young) of Cytisus scoparius
Other: major host/prey

Foodplant / saprobe
fruitbody of Pellidiscus pallidus is saprobic on dead, decayed branch of Cytisus scoparius

Foodplant / saprobe
fruitbody of Peniophora incarnata is saprobic on dead, attached branch (small) of Cytisus scoparius

Foodplant / internal feeder
larva of Phloeophthorus rhododactylus feeds within stem of Cytisus scoparius

Foodplant / pathogen
effuse colony of Pleiochaeta dematiaceous anamorph of Pleiochaeta setosa infects and damages cankered shoot (older) of Cytisus scoparius
Other: minor host/prey

Foodplant / feeds on
Polydrusus confluens feeds on Cytisus scoparius

Foodplant / saprobe
fruitbody of Postia tephroleuca is saprobic on dead, fallen, decayed wood of Cytisus scoparius
Other: unusual host/prey

Foodplant / open feeder
nocturnal larva of Rhogogaster genistae grazes on leaf of Cytisus scoparius
Other: major host/prey

Foodplant / open feeder
nocturnal larva of Rhogogaster picta grazes on leaf of Cytisus scoparius
Other: sole host/prey

Foodplant / feeds on
imago of Sitona griseus feeds on Cytisus scoparius

Foodplant / feeds on
larva of Sitona regensteinensis feeds on root nodule of Cytisus scoparius

Foodplant / feeds on
larva of Sitona striatellus feeds on Cytisus scoparius
Other: major host/prey

Plant / associate
Strophosoma capitatum is associated with Cytisus scoparius

Plant / associate
Tychius parallelus is associated with Cytisus scoparius