4 II 18 25 32 39 46 53 6 67 74 

 DAYS AFTER FUMIGATION 



Figure k. The relationship of percentage of infection of tomato ('Bonnie 

 Best') (•■■ ^) and inoculum density of Fusarium oxysporum f. sp. radicis - 

 lycopersici (OlIHlO) to time after fumigation of soils in which recoloniza- 

 tion by other microorganisms was inhibited; the pathogen was added 4 days 

 after fumigation at 1000 chlamydospores per gram of soil. 



