ABSTRACT

'Ten different varieties of tomato were screened in field experiments in Umudike, for tolerance to wilt diseases during the 1998 wet season. The results showed that all plants wilted and died 4 - 8 weeks after they were transplanted into the field. Vertical sections of wilted plants revealed progressive dark-brown discolouration and some times disinterpration of the pith and xylem tissues. When bits of diseased plant materials were incubated on PDA, organisms obtained included various fuscirium app.

TABLE OF CONTENTS

PAGE

Tittle page

Certification i

Abstract ii

Acknowledgement iii

Dedication iv

Table of content v

List of table and plates vi

CHAPTER ONE

1.1 Introduction 1-2

CHAPTER TWO

2.1 Uterature Review 3-11

2.2 Wilts Caused by Insects. 5

2.3 Wilts caused by Parasitic flowering plants 6

2.4 Bacterial Wilts 7

2.5 Fungal wilts 8-9

2.6 Biological Controls of farium wilt disease of Tomato 10

2.7 Chemical Controls of tomato diseases 10

2.8 Cultural Controls of tomato diseases 11

CHAPTER THREE

3.1 Materials and Methods 12

3.2 Nurseiy Preparation 12

3.3 Field experiment 12

3.3.1 Experimental site, design and transplantation 12

CHAPTER FOUR

4.1 Results, Discussion and Conclusion 12

References 2j2

Appendix 26

LIST OF TABLE

TABLES

4.1 Percentage of wilted and dead plants in 10 lines/varieties of rainfed tomato 2-8 weeks after

transplanting into the field.

LIST OF PLATES

PLATES

1. Tomatowiltinthefieldbeds 1

2. Internal tissues of a wilted and healthy tomato plants 1$

3. Roots of wilted and healthy tomato plant '19