Ability of an otherwise susceptible variety of plant to escape infection because of the way it grows (e.g., early-maturing plants escape late-season diseases).
nematodes that feed from outside roots, moving from cell to cell and piercing them to feed without entering root tissue. (Examples: dagger nematodes, Xiphinema spp.)
nematodes that feed inside roots, tunneling inside and moving back into soil and to new roots at will. (Examples: root-lesion nematodes, Pratylenchus spp.)
Disease symptom characterized by nonuniform foliage coloration, with a more or less distinct intermingling of normal and light green or yellowish patches. Usually caused by a virus.