Stem and bulb nematode

Stem and bulb nematode (Ditylenchus dipsaci) is a plant pathogenic nematode.

Identifying Features
Bulbs and stems become distorted and swollen. Young plants die, older plants produce soft bulbs that cannot be stored.

Treatment
None. Destroy infected plants by burning.

Prevention
Do not grow onions, peas, beans or strawberries on the same land for 3 years.