TABLE OF CONTENTS 



ACKNOWLEDGMENTS 11 



ABSTRACT lv 



SECTION I. EFFECTS OF FUMIGATION AND ANTAGONISTIC SOIL FUNGI ON THE 

 RELATIONSHIPS OF INOCULUM DENSITY TO INFECTION INCIDENCE 

 AND DISEASE SEVERITY IN FUSARIUM CROWN ROT OF TOMATO 



Introduction 1 



Materials and Methods 3 



Results 6 



Discussion 11 



SECTION II. EFFECT OF FUNGAL COMMUNITIES ON THE PATHOGENIC AND 

 SAPROPHYTIC ACTIVITIES OF FUSARIUM OXYSPORUM F. SP. 

 RADICIS-LYCOPERSICI 



Introduction 15 



Materials and Methods 1? 



Results 21 



Discussion JZ 



SECTION III. BIOLOGICAL CONTROL OF FUSARIUM CROWN ROT OF TOMATO 

 UNDER FIELD CONDITIONS 



Introduction 38 



Materials and Methods 39 



Results 4l 



Discussion ^8 



LITERATURE CITED 51 



BIOGRAPHICAL SKETCH S5 



iii 



