ABSTRACT

The efficacy of acetone extracts of Azadirachu indica seed, A. hid/ca leaf A.md/ca bark,Zingiber officinale rhizome, Caspsic:iin fri,iescens fruit, Monodora nzyristica seed, Jatropha curcas seed, mixture of Z. (?IticI,zale rhizome + Caspsicuin frzitescens fruit + M. uiyrislica seed + Azadirachia liL lieu seed arid a synthetic insecticide Pirimiphos methyl were evaluated for the control of infestation of Sitophilus zeamais (Mots). The ranking of the effectiveness of extracts in the control of S. zeanzais (Mots.) was Pirimiphos - methyl > Azciiiracta hid/ca seed > M. niyristica seed >1 Mixture > J. curcasseed> C. fruie.scens fruit > A. indicajeaf > Z.officinale rhizome> A. md/ca bark.. Generally Pirimiphos - methyl, M n;yris/ica seed, C'. frutescens fruit, A. indica seed and mixture were significantly superior (P=O.05) in their efficacy to other tested extracts. Based on weevil perforation index (WPI) all the botanials except Z. officinale rhizome showed positive protectant effect. The plant extracts with positive protectant eflèct have potential as seed protectants against S. zearnais (Mots.).

TABLE OF CONTENTS.

Tittle Page

Certification: ii

Acknowledgement iii

Dedication iv

Abstract: V

Table of Contents: vi

List of Tables and Plates vii

CHAPTER ONE

IntroductionS 1-2

CHAPTER TWO.

Literature Review:

2.1: Origin and Distribution of Maize 3.

2.2: General overview of storage insect Pests of

Maize and related Cereals 3-6

2.3: Traditional methods of storage of Grains 6-8

2.4: Range and use of synthetic chemicals in

storage products of insect Pest Control 8-10

2.5: Biopesticides ii storage of insect Pest control 10-i I

2.6: Si/op/i//us zeainais (Mots.) Description, biolo; and

methods of control in previously reported wor]. 11-13

CHAPTER THREE

Materials and Methods:.

3.1: S. zeamais used for the study 14.

3.2: Botanicals used for the study 14

3.3: Preparation of the botanicals 15

3.4: Application of botanicals/Establishment of Experiement 15-17

3.5: Data collected 17

CHAPTER FOUR

Results and Discussion 23-3 1

Conclusion and Recommendation 32.