Soil samples including plant roots, were taken from areas with plants suspected of being damaged by nematodes. Analysis and identification was carried out. The most common and widespread nematode wasRotylenchulus reniformiswhich had fifteen hosts. There was a consistently high build-up of this nematode in experimental plantings of passion fruit and chemicals have to be used for control. Two species of root-knot nematode,Meloidogyne incognitaandM. javanica, were widely found although infestation seemed to be confined to a few plants in a crop. OnlyMeloidogynespp. andRotylenchulus reniformisare of economic importance. The main crops, i.e. rice and citrus, have no nematode problems under current practices. However, nematodes may become a problem as larger intensive farming schemes are developed.