Stem and bulb nematode

Stem and bulb nematode (Ditylenchus dipsaci) also known as Bud and stem nematode, Beet stem nematode, Bulb nematode, Clover stem nematode, Onion stem nematode, Phlox stem nematode, Stem nematode, Teasel nematode and Tulip root nematode 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.