Two images, Ivy, Hedera helix covering both plants. The pine trunks are sturdy and it will take several seasons to smother these. The Viburnum is different, colonised at the same time the two are totally different in their approach and growth habit. The Ivy in the Viburnum should be removed with urgency; the vigorous evergreen growth will smother the life out of this plant. Vigour will be reduced and the Viburnum smothered by the end of the 2017 growing season. In the case of the Pines; secateurs can be used to snip the shoots growing up the trunk. The severed growth will die back and can then be pulled from the trunk.
Carpets of Ivy, Hedera helix, are wonderful for ground cover but once the vigorous shoots start encroaching on tree trunks, walls and through the base of woody shrubs competition is fierce. The juvenile growth has smaller leaves. After several years mature, more woody growth is produced and this holds flowers and subsequent fruit. A giant in the ecological world, Ivy provides cover to myriad organisms, stability to soil, food in the form of pollen, nectar and berries, as a foil to mature trees, bird nesting cover. It does, however, need to be kept within acceptable bounds in a garden. Rampant Ivy saps vigour from other plants and on buildings will unseat coping stones and disrupt roof tiles.