Aetiology of the fungal rot of cucumber fruit (cucumis sativus l.) and the efficacy of its control with phytochemicals from crude extracts of two plants | Blazingprojects Postgraduate Thesis
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Aetiology of the fungal rot of cucumber fruit (cucumis sativus l.) and the efficacy of its control with phytochemicals from crude extracts of two plants

 

Table Of Contents


Chapter ONE

INTRODUCTION

  • 1.1Introduction
  • 1.2Background of Study
  • 1.3Problem Statement
  • 1.4Objective of Study
  • 1.5Limitation of Study
  • 1.6Scope of Study
  • 1.7Significance of Study
  • 1.8Structure of the Research
  • 1.9Definition of Terms

Chapter TWO

LITERATURE REVIEW

  • 2.1Overview of Fungal Rot of Cucumber Fruit
  • 2.2Causes of Fungal Rot in Cucumber Fruit
  • 2.3Effects of Fungal Rot on Cucumber Fruit
  • 2.4Phytochemicals and Their Role in Plant Disease Control
  • 2.5Previous Studies on Phytochemicals for Disease Control
  • 2.6Plant Extracts Used in Disease Management
  • 2.7Mechanisms of Action of Phytochemicals
  • 2.8Efficacy of Phytochemicals in Controlling Fungal Rot
  • 2.9Challenges in Using Phytochemicals for Disease Control
  • 2.10Future Research Directions

Chapter THREE

RESEARCH METHODOLOGY

  • 3.1Research Design and Rationale
  • 3.2Selection of Plant Samples
  • 3.3Extraction of Phytochemicals
  • 3.4Experimental Setup for Disease Control Testing
  • 3.5Data Collection Methods
  • 3.6Data Analysis Techniques
  • 3.7Ethical Considerations
  • 3.8Limitations of the Research Methodology

Chapter FOUR

DATA PRESENTATION AND ANALYSIS

  • 4.1Analysis of Phytochemical Composition in Plant Extracts
  • 4.2Effects of Plant Extracts on Fungal Growth
  • 4.3Comparative Efficacy of Different Plant Extracts
  • 4.4Mechanistic Insights into Disease Control
  • 4.5Synergistic Effects of Combined Plant Extracts
  • 4.6Field Application of Phytochemicals
  • 4.7Long-Term Stability and Storage Considerations
  • 4.8Implications for Sustainable Disease Management

Chapter FIVE

SUMMARY, CONCLUSION AND RECOMMENDATIONS

  • 5.1Summary of Findings
  • 5.2Conclusions
  • 5.3Recommendations for Future Research
  • 5.4Practical Applications of Research Results
  • 5.5Contributions to the Field of Plant Disease Management

Thesis Abstract

The aetiology of the fungal rot of cucumber fruit (Cucumis sativus L.) in Enugu State was investigated. Five fungal pathogens were isolated from diseased cucumber fruits. They were identified as Fusarium oxysporum Schlecht, Aspergillus niger Van Tiegh, Rhizopus stolonifer Ehrenb. ex.Fr, Geotrichum candidum Link and Mucor micheli ex Staint – Amans. The pathogenicity tests proved them as the causal agents of the rot. The effects of ethanolic extracts of Chromolaena odorata and Moringa oleifera and benlate solution on the isolates wegre also determined. The ethanolic extracts of the test plants inhibited mycelial growth of the pathogens in vitro as well as in vivo. The inhibitory effects of the extracts increased with increase in concentration. All concentrations of 20 mg/ml to 100 mg/ml reduced the mycelial growth of the pathogens to some significant (P > 0.05) level. Benlate solution also reduced the mycelial growth of the pathogens. Phytochemical analysis of C. odorata revealed the presence of tannins, saponins, phenols, flavonoids, terpenoids, glycosides and alkaloids while M. oleifera contained all the phytochemicals except alkaloids. The presence of these active ingredients in the extracts may have contributed to their inhibitory properties. These findings suggest that plant extracts could serve as potential sources of bio-fungicides.

Thesis Overview

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