Native species of subterranean termites (Reticulitermes sp.) occur in the dry interior of B.C. where they occasionally consume woody heartwood tissue of old or weakened vines or untreated support posts, causing vines and trellises to collapse.
Termites live in the soil in colonies comprising various forms, including queens, kings, workers and soldiers.
The eyeless workers are 3-5 mm long with creamy pale bodies, while the slightly larger soldiers have enlarged heads and black jaws.
They are distinguished from ants by their dull, pale, bead-like antennae and broad, rather than constricted, waist connecting the abdomen.
As termites live deep in the ground and feed on dead woody tissue, they are difficult to control with insecticides. None are registered for this purpose in B.C.
There are no effective natural controls, but sanitation and removal of wooden debris prior to planting will help delay infestations.
Termites do not eat the outer living tissue, so maintaining healthy vines is helpful. Old, heavily infested vineyard blocks may need to be replaced.
