Jorge Pinochet B.1, Héctor González R.2 y Domingo Godoy H.2

The effects of different nematicides and doses on the population of Tylenchulus semipenetrans (Citrus nematode), Pratylenchus, Helicotylenchus, Xiphinema, Paratylenchus and Criconemoides were studied in a lemon orchard hardly attacked by nematodes.
Fumazone (30 and 45 liter/ha) gave the best control (98.8% and 99.1%) of Tylenchulus semipenetrans and other parasitic nematodes. This nematicide acted more showed the best residual effect.
None of the nematicides produced fitotoxicity on the trees.

1Ingeniero Agrónomo. Actualemente en Davis, California 95616, U.S.A. (Departament of Plant Pathology).
2Ings. Agrs. Proyecto Fruticultura, Estación Experimental La Platina, Insittuto de Investigaciones Agropecuarias (INIA). Casilla 5427, Santiago, Chile.