As far as I know, ants alone are not harmful to grapevines but their presence usually signals something else is present–like aphids. Ants in general, except perhaps for fire ants and carpenter ants, are beneficial in a garden as they haul off tons of dead insects.

Will ants hurt my grape vines?

Ants alone are not harmful to grapevines as far as I know, but their presence usually signals something else is present–like aphids. If you find aphids, you can hose them off with a sharp stream of water or treat the plant with insecticidal soap.

What pests eat grape vines?

Grape berry moths feed on flowers and fruit and can cause significant yield losses; Both species cause nearly identical symptoms. However, it is the larvae, rather than the adults, that are responsible for the majority of the damage to grapevines; The European grapevine moth (L.