Post-Harvest Control of Yam Tuber Rot Caused by Rhizopus Oryzae and Botyodiplodia Theobromea Using Leaf Extracts Of Tobacco (Nicotiana Tabacum) and Papaya (Asimina Triloba)
ABSTRACT
Post-harvest microbial rot is one of yam diseases which occurs both in the field and barn. The pathogenic fungi most frequently encountered in this study included: Rihizopus., oryzae and Bolryodiplodia theohroniea. These organisms were isolated from stored yam tubers. They caused soft rot leading to tissue discolouration and production of foul smell from the rotted portion of the tubers. Tubers which were infected with R .oryzae and B. theobromea rotted completely after 14 days of incubation. However, the alcohol extract of tobacco (Nicotiana tabacum) and Papaya Asimina lriiohq) suppressed the growth of the pathogenic fungi, R,. Oryzae and B. Iheobromea in culture and reduced rot development in yam tubers.
TABLE OF
CONTENTS
PAGE TITTLE
Dedication ii
Acknowledgement
iii
Abstract iv
Certification V
List of Plates
... vi
List of Tables
•.. vii
Table of
Contents viii
CHAPTERS '1.
INTRODUCTION 2.
MATERIALS AND METHOIS 2.1
Sources of
Pathogen on Yarn tuber 8 2.2
The Culture
Media 8 2.3
Isolation of
Pathogen 2.4
Pathogenicity
Test II 2.5
Extraction of
the plant Materials 12 2.6
Effect of the
Extraôt on the radial Growth of the Fungi 2.7
Effect of Extrat
oii rot development on tubers I 3.
RESULTS 3.1
The results of
the Isolation 1 3.2
Effect of leaf
extract on the radial Growth of Rhizojms oryze 1£ 3.3
Effect of leaf
Extract on the radial Growth of Boliyodiplodia iheobromea 3.4
Effect of
ethanol leaf Extract on rot Development in yarn tubers by R. Oryazae 17 3.5
Effect of Extract on rot development in Yam
tubers by B. iheohroniea 13 4.
DISCUSSION 0 21
REFERENCES 24-25
0.0
OBILOR, N (2021). Post-Harvest Control of Yam Tuber Rot Caused by Rhizopus Oryzae and Botyodiplodia Theobromea Using Leaf Extracts Of Tobacco (Nicotiana Tabacum) and Papaya (Asimina Triloba). Repository.mouau.edu.ng: Retrieved Apr 26, 2024, from https://repository.mouau.edu.ng/work/view/post-harvest-control-of-yam-tuber-rot-caused-by-rhizopus-oryzae-and-botyodiplodia-theobromea-using-leaf-extracts-of-tobacco-nicotiana-tabacum-and-papaya-asimina-triloba-7-2
NWABUEZE, OBILOR. "Post-Harvest Control of Yam Tuber Rot Caused by Rhizopus Oryzae and Botyodiplodia Theobromea Using Leaf Extracts Of Tobacco (Nicotiana Tabacum) and Papaya (Asimina Triloba)" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 17 May. 2021, https://repository.mouau.edu.ng/work/view/post-harvest-control-of-yam-tuber-rot-caused-by-rhizopus-oryzae-and-botyodiplodia-theobromea-using-leaf-extracts-of-tobacco-nicotiana-tabacum-and-papaya-asimina-triloba-7-2. Accessed 26 Apr. 2024.
NWABUEZE, OBILOR. "Post-Harvest Control of Yam Tuber Rot Caused by Rhizopus Oryzae and Botyodiplodia Theobromea Using Leaf Extracts Of Tobacco (Nicotiana Tabacum) and Papaya (Asimina Triloba)". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 17 May. 2021. Web. 26 Apr. 2024. < https://repository.mouau.edu.ng/work/view/post-harvest-control-of-yam-tuber-rot-caused-by-rhizopus-oryzae-and-botyodiplodia-theobromea-using-leaf-extracts-of-tobacco-nicotiana-tabacum-and-papaya-asimina-triloba-7-2 >.
NWABUEZE, OBILOR. "Post-Harvest Control of Yam Tuber Rot Caused by Rhizopus Oryzae and Botyodiplodia Theobromea Using Leaf Extracts Of Tobacco (Nicotiana Tabacum) and Papaya (Asimina Triloba)" Repository.mouau.edu.ng (2021). Accessed 26 Apr. 2024. https://repository.mouau.edu.ng/work/view/post-harvest-control-of-yam-tuber-rot-caused-by-rhizopus-oryzae-and-botyodiplodia-theobromea-using-leaf-extracts-of-tobacco-nicotiana-tabacum-and-papaya-asimina-triloba-7-2