Gonad structure variable often with characteristic features for a particular species. Tail shape varies from short, rounded, to elongate conoid, occasionally filiform. It is thought that this nematode was imported into California from France on infested grape rootstocks. 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 the nematode is not feeding. The virus is lost at molting. Grapevine fanleaf virus causes reduced vigor, lack of fruit set, and reduced yield.