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.  ECTOPARASITIC EELWORMs : these may carry viral deseases resulting in yellowing of foliage from the base up.  Root-lesion eeelworms : 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.