The warning has been issued because the Epitrix potato beetle, which can be found in those crops, is rife in the European countries and could destroy entire crops if imported into Jersey.
The Environment department says that bringing potatoes into Jersey for planting is against the law and can bring in dangerous and destructive pests into the Island.
The department is also urging Islanders not to bring back fruit and aubergine, pepper or tomato plants from areas where the beetles are present.
Scott Meadows, entomologist and head of plant health, said that the campaign had been launched because the beetles had been spreading and there had been reports of it in France. However, there are no reports of the pest in Jersey.
