Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control

Isolation of disease pathogen from infected cocoa leaves and pods associated with leaf spot and pod rot disease yielded Colletotrichum gloeosporioides. No distinct differences in cultural and morphological characteristics were noted from the various isolates. Further investigation by polyacryla...

Full description

Saved in:

Bibliographic Details
Main Author:	Yee, Ming Fatt
Format:	Thesis
Language:	English English
Published:	1991
Subjects:	Cocoa - Diseases - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/10302/1/FP_1991_11_A.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.10302
record_format	uketd_dc
spelling	my-upm-ir.103022011-03-22T00:48:38Z Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control 1991 Yee, Ming Fatt Isolation of disease pathogen from infected cocoa leaves and pods associated with leaf spot and pod rot disease yielded Colletotrichum gloeosporioides. No distinct differences in cultural and morphological characteristics were noted from the various isolates. Further investigation by polyacrylamide vertical gel electrophoresis indicated that protein, esterase and peroxidase patterns were unable to differentiate strain gloeosporioides. variation within C. The fungus was found to grow and sporulate well at 30°C. Cocoa Leaf Extract Agar (CLEA) was the best medium for mycelial growth while Potato Dextrose Agar (PDA) appeared to favour sporulation. Better mycelial growth was also achieved on substrates of neutral condition while extreme alkaline condition induces sporulation. Both cocoa leaves and injured pods were liable to infection by C. gloeosporioides. Three-week old cocoa seedlings and cherelles were noted as the most susceptible stage. The development of Colletotrichum leaf spot disease invariably involved three phases of activity viz., prepenetration phase which involved spore germination and formation of appressoria, penetration phase involving intercellular and intracellular hyphal penetration and postpenetration phase resulting in disintegration of cells and the formation of acervuli. Cocoa - Diseases - Case studies 1991 Thesis http://psasir.upm.edu.my/id/eprint/10302/ http://psasir.upm.edu.my/id/eprint/10302/1/FP_1991_11_A.pdf application/pdf en public masters Universiti Pertanian Malaysia Cocoa - Diseases - Case studies Faculty of Agriculture English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Cocoa - Diseases - Case studies
spellingShingle	Cocoa - Diseases - Case studies Yee, Ming Fatt Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
description	Isolation of disease pathogen from infected cocoa leaves and pods associated with leaf spot and pod rot disease yielded Colletotrichum gloeosporioides. No distinct differences in cultural and morphological characteristics were noted from the various isolates. Further investigation by polyacrylamide vertical gel electrophoresis indicated that protein, esterase and peroxidase patterns were unable to differentiate strain gloeosporioides. variation within C. The fungus was found to grow and sporulate well at 30°C. Cocoa Leaf Extract Agar (CLEA) was the best medium for mycelial growth while Potato Dextrose Agar (PDA) appeared to favour sporulation. Better mycelial growth was also achieved on substrates of neutral condition while extreme alkaline condition induces sporulation. Both cocoa leaves and injured pods were liable to infection by C. gloeosporioides. Three-week old cocoa seedlings and cherelles were noted as the most susceptible stage. The development of Colletotrichum leaf spot disease invariably involved three phases of activity viz., prepenetration phase which involved spore germination and formation of appressoria, penetration phase involving intercellular and intracellular hyphal penetration and postpenetration phase resulting in disintegration of cells and the formation of acervuli.
format	Thesis
qualification_level	Master's degree
author	Yee, Ming Fatt
author_facet	Yee, Ming Fatt
author_sort	Yee, Ming Fatt
title	Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
title_short	Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
title_full	Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
title_fullStr	Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
title_full_unstemmed	Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control
title_sort	colletotrichum disease of cocoa (theobroma cacao l.) and its control
granting_institution	Universiti Pertanian Malaysia
granting_department	Faculty of Agriculture
publishDate	1991
url	http://psasir.upm.edu.my/id/eprint/10302/1/FP_1991_11_A.pdf
_version_	1747811091781517312

Colletotrichum Disease of Cocoa (Theobroma Cacao L.) and its Control

Similar Items