Biological control of plant pathogens in the tropics

Ko W.H., . (1992) Biological control of plant pathogens in the tropics. [Proceedings Paper]

Soil microbiostasis inactivates microorganisms added to soil. Deficiency of nutrients also prevents added microorganisms from producing antibiotics in soil. Moreover these microorganisms are too far away to exert any influence against plant pathogens in nature. Therefore even those antagonistic microorganisms which can produce dramatic zones of inhibition in the laboratory are generally ineffective in controlling plant pathogens in nature when added directly to soil. The concept of primitive and advanced pathogens or parasites is very useful in determining which biological control measure should be used for a specific pathogen. Coating seeds with antagonistic microorganisms and planting seeds in a small amount of virgin soil are more suitable for controlling primitive pathogens than advanced ones. On the other hand screening for resistance crop rotation and organic amendment are more suitable for controlling advanced patogens. Rotation with crops cultivated on flooded soil searching for decay crops or antagonistic plants amending soil with organic materials mixed with antagonistic microorganisms and exploration of suppressive soil are considered promising approaches to biological control of plant pathogens in the tropics

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Abstract

Soil microbiostasis inactivates microorganisms added to soil. Deficiency of nutrients also prevents added microorganisms from producing antibiotics in soil. Moreover these microorganisms are too far away to exert any influence against plant pathogens in nature. Therefore even those antagonistic microorganisms which can produce dramatic zones of inhibition in the laboratory are generally ineffective in controlling plant pathogens in nature when added directly to soil. The concept of primitive and advanced pathogens or parasites is very useful in determining which biological control measure should be used for a specific pathogen. Coating seeds with antagonistic microorganisms and planting seeds in a small amount of virgin soil are more suitable for controlling primitive pathogens than advanced ones. On the other hand screening for resistance crop rotation and organic amendment are more suitable for controlling advanced patogens. Rotation with crops cultivated on flooded soil searching for decay crops or antagonistic plants amending soil with organic materials mixed with antagonistic microorganisms and exploration of suppressive soil are considered promising approaches to biological control of plant pathogens in the tropics

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Item Type:	Proceedings Paper
Additional Information:	39 ref.; Summary En
AGROVOC Term:	ORGANISMOS PATOGENOS
AGROVOC Term:	MICROORGANISMOS
AGROVOC Term:	CONTROL BIOLOGICO
AGROVOC Term:	ZONA TROPICAL/ ENMIENDAS DEL SUELO
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/14939

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