Stem and bulb nematode (Ditylenchus dipsaci) is a nematode pest of onion, garlic, ornamental bulbs and field crops. It was first detected in Ohio in 1986.
This nematode pest is capable of long periods of dormancy during drought or freezing temperatures. Ditylenchus dipsaci attacks the bulbs and cloves of onions, garlic, and ornamentals. Hosts include onion, garlic, carrots, peas, potatoes, strawberry, apples and peaches. .