Vine weevils are difficult to control once established because of their nocturnal behaviour.
For more of a natural remedy for vine weevils, try to encourage natural predators such as birds, frogs, toads, shrews, hedgehogs, and predatory ground beetles.
If you don't want to use pesticides in your garden, use a biological control based on parasitic nematodes. These microscopic creatures enter the bodies of the grubs and release bacteria that will poison them. They then multiply and go on to attack other grubs.
Apply during August and early September when the soil temperature is warm enough for the nematodes to be effective (5-20 degrees C) and before the vine weevils have grown large enough to cause serious damage. After applying the biological control, keep the soil moist for a fortnight after applying.
Finally, keep looking for vine weevils once you think they have been eradicated, as you don’t want to let the number of pests build up again.