II 



DAYS 



18 

 AFTER 



25 32 



FUMIGATION 



39 



Figure 5. The relationship of percentage of infection of tomato ('Bonnie 

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

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

 tion by other microorganisms was not inhibited; the pathogen was added 4 

 days after fumigation at 1000 chlamydo spores per gram of soil. 



