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Woodlice

Woodlice belong to the crustaceans and, unlike the vast majority of crustaceans, do not live in water but on land.

recognize woodlouse
Woodlice, photo: Arctanx - CC Public Domain

Woodlice (Isopoda) belong to the crustaceans (Crustacea) and, unlike the vast majority of crustaceans, do not live in water but on land. Woodlice are blue-gray and about 13 mm in size; they can live up to three years.
Woodlice need a slightly moist environment; they do not tolerate drought. Woodlice live on dead organic material. They break down biological mass in the soil (humification) and improve soil structure.
Sometimes – if there are very many of them – they can cause damage to young plants by eating the roots. In a greenhouse (humid environment) they can be a pest.

Where to find

  • General in vegetable and ornamental garden

Control

Woodlice are useful little animals; controlling them is out of the question.

Prevention

Woodlice are sometimes a pest in a greenhouse. This can be avoided by using fully decomposed compost and manure in the greenhouse, not letting weeds stand and clearing fallen leaves in a timely manner.