Radopholus citri n. sp. is described and illustrated from the roots of Citrus seedlings and trees growing in sandy soils in East Java, Indonesia. The new species is characterized by the relatively strongly developed conus of the male stylet and less well developed, but distinct, knobs. It cornes closest to R. vangundyi Sher, 1968, R. neosimilis Sauer, 1958, and R. nativus Sher, 1968. In pathogenicity experiments, population levels of 1000 nematodes or more per plant caused highly significant reduction in root weights, fresh and dry top weights, number of leaf nodes, and growth as measured by length of stems and branches. Nematodes were confirmed to the cortical tissues and were associated with very severe necrosis and root destruction.
Bridge, J.; Machon, J.E. Radopholus citri n.sp. (Tylenchida: Pratylenchidae) and its pathogenicity on citrus. Fundamental and applied nematology (1996) 19 (2) 127-133.