How to identify and manage vine weevil

UK seasonality and monitoring

Adults feed in summer; larvae are a major autumn and winter container risk.

During this period inspect Strawberries, container plants and ornamental crops, concentrating on the crop stage and plant parts described above. Note when and where fresh injury appears; old feeding marks can remain after the pest has moved on.

Crops and plants affected

The recorded hosts are Strawberries, container plants and ornamental crops. This list identifies plants worth checking; it does not mean every crop is equally vulnerable. Start with the listed plants and inspect the tissue where this pest feeds.

Check affected crops for these signs: Plants wilt as roots are eaten, especially in containers and strawberries. Match the symptom to a live pest, larva, egg or characteristic feeding sign before deciding that treatment is needed.

Damage and likely consequences

Plants wilt as roots are eaten, especially in containers and strawberries. A small amount of old damage on a vigorous plant may be cosmetic. Continued feeding on roots, seedlings, growing points or edible parts can reduce establishment or yield.

On Strawberries, container plants and ornamental crops, judge severity by checking whether injury is fresh and spreading, whether the plant is still growing, and whether the edible part is affected. Avoid removing a crop based on one ambiguous mark.

Prevention

Inspect new container plants and growing medium before adding them to existing pots. Check for leaf notches and unexplained wilting.

Control and integrated management

Check a wilted container rootball for grubs; adult leaf notches alone do not explain root damage.

Natural predators and wildlife-conscious choices

Target treatment to affected containers and protect soil life elsewhere.

For vine weevil on Strawberries, container plants and ornamental crops, use a barrier or hand removal only where it fits the crop and life stage. Keep any cover taut, inspect it for trapped wildlife, and remove it when protection is no longer needed.

Long-term management

Recheck container roots in autumn and winter and remove grubs by hand when found.

For vine weevil on Strawberries, container plants and ornamental crops, record the bed, crop stage and date when fresh damage first appears. Those notes help time protection and monitoring before the same crop stage is vulnerable next season.

Common mistakes

A symptom alone is not a diagnosis. Adult vine weevils make characteristic notches around leaf edges at night. The more serious container damage is caused by cream, legless grubs with brown heads feeding around roots and crowns. Look for a matching live pest or fresh feeding sign before intervening.

The larvae feeding around roots and crowns usually cause more serious damage than adult notching.

If damage continues

Recheck Strawberries, container plants and ornamental crops where new injury is appearing, including the hidden feeding site: roots, folded leaves, leaf undersides, flowers or fruit as appropriate. If identification remains uncertain, photograph a live specimen alongside the damage and ask an allotment association or horticultural adviser.

If the recommended control (Hand pick adults at night and use approved biological nematodes when conditions suit.) has not helped, confirm that it was fitted or applied at the right crop stage and that fresh damage is still occurring. Old marks do not heal when the pest has gone.

Frequently asked questions