PLANT NEMATODES THE GROWER SHOULD KNOW 17

of great practical importance since they find their application in control
through effective crop rotations.
 There are still other complicating factors that make the diagnosis
of root-knot infections and a proper appreciation of their significance
























 y--















figure 10.-Roots and basal stem of a rose geranium exhibiting galls (at arrows) of
 root-knot nematodes.