Gardens recently recovering from grassland or badly tended gardens suffer
most from this troublesome pest.
The shiny yellow larvae, which are
about 2.5 cm (1 in) long, bore small regular holes in most root crops,
including parsnips. Small roots may quite often be almost entirely
The above picture is of a
wireworm having damaged a developing seed. If you can bear to see an
enlarged picture, click on the picture above.
Keep wireworm down by carefully weeding and cultivation. Treat very
badly infected land with an insecticide, and do not plant
parsnips or any other crops for four or five years.