Generally found in Northern California, but sporadically as far south as Kern County. Reproduction is by meiotic parthenogenesis.
Males are very rare.
The nematode transmits grapevine fanleaf virus. The virus is intimately associated with the esophageal lining. It is acquired in 5-15 minutes of feeding, and persists for up to 9 months when nematode is not feeding. Virus is lost at molt. Grapevine fanleaf virus causes reduced vigor, lack of fruit set, and reduced yield.