a large black aphid on the stem of an ivy climbing a tree trunk in a garden

aphid aphids black insect insects pest pests large ivy stem trunk tree garden climbing plant parasite parasites nature closeup wildlife ecology infestation damage foliage greenery botany biodiversity pestcontrol arthropod sapsucking parasitecontrol leaf leaves pestproblem infestationcontrol aphidcontrol ivyplant insectpest naturecloseup parasitemanagement pestmanagement gardeninsect wild treeivy trunkinsect