Substantial dieback of branches in the upper canopy. Examination revealed the presence of many small galls and egg masses on feeder roots-with female nematodes often protruding from root tissue. The worms were identified as root-knot nematodes, Meloidogyne partityla. Host range tests conducted in Texas, revealed that it prefers to feed on hickory, pecan, and walnut trees. Although M. partityla is not likely to kill the pecan trees, it will debilitate them and lower their productivity to a point where the orchard may no longer be profitable.