Foodplant / miner
solitary larva of Agromyza flaviceps mines leaf of Humulus lupulus
Other: sole host/prey
Foodplant / miner
larva of Agromyza igniceps mines leaf of Humulus lupulus
Other: sole host/prey
In Great Britain and/or Ireland:
Foodplant / pathogen
Armillaria mellea s.l. infects and damages Humulus lupulus
Foodplant / spot causer
epiphyllous, immersed, brownish pycnidium of Ascochyta coelomycetous anamorph of Ascochyta humuli causes spots on live leaf of Humulus lupulus
Foodplant / pathogen
Botrytis dematiaceous anamorph of Botrytis cinerea infects and damages live Humulus lupulus
Foodplant / saprobe
sessile apothecium of Clavidisculum humuli is saprobic on dead stem of Humulus lupulus
Foodplant / parasite
haustorium of Cuscuta europaea parasitises stem of Humulus lupulus
Other: major host/prey
Foodplant / saprobe
gregarious perithecium of Diaporthe sarmenticia is saprobic on dead stem of Humulus lupulus
Foodplant / false gall
clustered perithecium of Gibberella pulicaris causes swelling of dead stem of Humulus lupulus
Remarks: season: 1-4
Other: minor host/prey
Foodplant / saprobe
fruitbody of Lachnella alboviolascens is saprobic on dead stem (large) of Humulus lupulus
Foodplant / gall
Meloidogyne incognita causes gall of root of Humulus lupulus
Foodplant / internal feeder
larva of Mitoplinthus caliginosus feeds within rootstock of Humulus lupulus
Foodplant / spot causer
amphigenous colony of Mycocentrospora coelomycetous anamorph of Mycocentrospora cantuariensis causes spots on live leaf of Humulus lupulus
Foodplant / saprobe
short-stalked apothecium of Pezizella discreta is saprobic on dead stem of Humulus lupulus
Remarks: season: 10-11
Foodplant / parasite
Phacidiopycnis coelomycetous anamorph of Phacidiopycnis tuberivora parasitises live Humulus lupulus
Foodplant / sap sucker
Phorodon humuli sucks sap of live shoot of Humulus lupulus
Remarks: season: 5-
Foodplant / saprobe
Phycomyces is saprobic on spent hop (inflorescence) mulch of Humulus lupulus
Foodplant / spot causer
amphigenous, scattered, smoky-yellow pycnidium of Phyllosticta coelomycetous anamorph of Phyllosticta humuli causes spots on fading leaf of Humulus lupulus
Foodplant / pathogen
Phytophthora citricola infects and damages live root of Humulus lupulus
Foodplant / parasite
cleistothecium of Podosphaera macularis parasitises Humulus lupulus
Remarks: season: 8-9
Foodplant / parasite
sporangium of Pseudoperonospora humuli parasitises live cone of Humulus lupulus
Remarks: season: 8-9,5
Other: sole host/prey
Foodplant / saprobe
apothecium of Psilachnum tami is saprobic on dead stem of Humulus lupulus
Foodplant / open feeder
imago of Psylliodes attenuata grazes on leaf of Humulus lupulus
Foodplant / saprobe
embedded sclerotium of Sclerotinia sclerotiorum is saprobic on dead, decaying stem of Humulus lupulus
Foodplant / spot causer
epiphyllous, central but scattered pycnidium of Septoria coelomycetous anamorph of Septoria humuli causes spots on fading leaf of Humulus lupulus
Plant / resting place / within
female of Thrips albopilosus may be found in live flower of Humulus lupulus
Remarks: season: 7-9
Foodplant / pathogen
Verticillium albo-atrum infects and damages Humulus lupulus
Foodplant / pathogen
Verticillium dahliae infects and damages Humulus lupulus