EELWORMS - These are worms which inhibit growth by attacking plant roots.

There are several types:  Cyst eelworms: which pierce the roots creating galls which protect them.

OPARASITIC EELWORMS - these may carry viral diseases resulting in yellowing of foliage from the base up.

Root-lesion eelworms: these build nests which cause canker in the roots causing yellowing of foliage and possible fungal development.

Treatment requires removal of yellowing leaves and spraying of remaining foliage with a parathion based wash, plus mixing nematicides with the soil which should be prevented from excess wetness