The wireworm can be a serious pest on an allotment as it will attack the roots of most vegetable crops and also tubers of show flowers such as dahlias. Once the wireworm has burrowed into the root, there is very little that can be done to save the crop.
The wireworm loves grassland so that if you are turning such an area into vegetable plot or border you have a good chance of finding this pest. You may also be afflicted if you take over a badly cultivated allotment where there has been no proper digging over or weed clearance undertaken.
Information on Wireworms will tell you everything that you can wish to know about this pest and how to recognise it in your garden or on your allotment.
Harrod Horticultural also cover the subject of dealing with wireworm in response to a query from a customer.
Practical advice from chicken keepers is that after you have dug your allotment over both in November and in the late spring, if you can allow your chickens to roam across the freshly dug soil they will eradicate all the wireworms they can see. Apparently chickens love these grubs to eat.