Home / Biochemistry / 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

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

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

Chapter TWO

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

Chapter THREE

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

Chapter FOUR

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

Chapter FIVE

5.1 Summary of Findings
5.2 Conclusions
5.3 Recommendations for Future Research
5.4 Practical Applications of Research Results
5.5 Contributions 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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