Potential for biological control of root disease of cocoa in Papua New Guinea

Jollands P., . (1986) Potential for biological control of root disease of cocoa in Papua New Guinea. [Proceedings Paper]

Root disease of cocoa caused by Rigidoporus lignosus and Phellinus noxius became a problem now that large wereas of cocoa were being replanted for the first time and large numbers of stumps were exposed. Artificial inoculation of stumps with spores and mycelial suspension of the two pathogens was unsuccessful though field observations had shown large numbers of stumps to be infected by the pathogens. Stump protection was required and use of a biological agent has the advantage over chemical stump treatment as it degraded the stump and replaced the pathogen in already colonised tissue. Saprophytic fungi isolated from cocoa and Leuceana stumps and fallen logs were tested for their ability to decay wood and to compete with P. noxius in blocks of wood. Two of those tested showed potential and will be further tested in field experiments

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Abstract

Root disease of cocoa caused by Rigidoporus lignosus and Phellinus noxius became a problem now that large wereas of cocoa were being replanted for the first time and large numbers of stumps were exposed. Artificial inoculation of stumps with spores and mycelial suspension of the two pathogens was unsuccessful though field observations had shown large numbers of stumps to be infected by the pathogens. Stump protection was required and use of a biological agent has the advantage over chemical stump treatment as it degraded the stump and replaced the pathogen in already colonised tissue. Saprophytic fungi isolated from cocoa and Leuceana stumps and fallen logs were tested for their ability to decay wood and to compete with P. noxius in blocks of wood. Two of those tested showed potential and will be further tested in field experiments

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. SB267 I61 1984 Call Number
AGROVOC Term:	Theobroma cacao
AGROVOC Term:	Mycoses
AGROVOC Term:	Biological control
AGROVOC Term:	Roots
AGROVOC Term:	Infection
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:25
URI:	http://webagris.upm.edu.my/id/eprint/14389

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