45 



12 



10- 



o 



CO 



o> 

 O 



8 - 



CO 



UJ 



_l 



6- 



O 



cr 

 a. 



2- 



1 B' 





1 



1 1 X 



— 







r~r _ 

 1 » 



— 







/ / 





•^ 



^ 



i Is 



1 yX 



1 1 





r^cV 



_L 



i I 



~ 3 5 10 15 20 



WEEKS AFTER PLANTING 



Figure 8 - B. Relationship of population density of Fusarium oxysporum 

 f. sp. radicis-lycopersici to time after planting in nonamended soils 



under field conditions at planting date one (0 0) , planting date two 



(X X) , and planting date three (• •) . The pathogen was added 



initially at 5000 chlamydospores per plant. 



