Abstract
Fumigation of Fox sandy loam field soils naturally infested with Verticillium dahliae delayed the onset and reduced the final incidence of Verticillium wilt of eggplant. Fumigation resulted in greater plant growth and concomitant increases in yield. Vorlex and EP-201 applied at 561.6 l./ha gave similar control of wilt and yield increases. Fumigation with Vorlex gave best control of wilt in 1964 and 1965, years in which the upper 15 cm of soil contained uniformly high moisture at the time of treatment. Vorlex applied at 561.6 l./ha reduced root populations of the root-lesion nematode Pratylenchus penetrans to considerably lower levels than Telone at 449.3 l./ha. Vapam was not as effective in controlling wilt as either Vorlex or EP-300, though like EP-300 it caused no early retardation of growth of eggplant. Yield increases from fumigation varied from year to year and ranged from 5 to more than 100 times yields from untreated soils. Soil fumigation in eggplant culture promises to be practical in southwestern Ontario where Verticillium wilt is serious.
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