EFFECTS OF TRANSPLANT INJURY AND NEMATODES ON INCIDENCE OF VERTICILLIUM WILT OF EGGPLANT

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Abstract
The fungus Verticillium dahliae apparently utilizes injured cortical tissue to reach the vascular elements in eggplant roots. The two major sources of such root injury in sandy soils of Ontario are the damage caused mechanically in the transplanting of the seedlings to the field and the root lesions caused by the nematode Pratylenchus penetrans. Transplant injury may be the more important factor early in the season and nematode injury later in the season. The effect of either of these two factors, acting independently, on incidence of disease, however, appears to be about the same.