Causal Agent:
Nematode(Meloidogyne sp.)
| Characteristic Symptoms: | |
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Above-ground symptoms of heavily infected plants appear as moderate to severe leaf chlorosis and plant stunting. |
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Some wilting may occur during periods of peak transpirational stress on the plant. |
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Papaya roots attacked by RKN shows varying degrees of galling depending on the numbers of the nematode in the soil or the subsequent hatching of egg, migration of the larvae and re-infection of surrounding tissue. |
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Root systems may be somewhat reduced because terminal infections of roots cause a slight and cessation of further elongation. |
| Management and Control: | |
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Pre-plant fumigation are effective against root-knot nematodes. However consideration must be given to first allow adequate time for breakdown of heavily galled roots. Moist root tissue is a barrier to the penetration of fumigants. Roots decay readily in moist soils and very slowly in dry ones.
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| References: | |
| http://www.extento.hawaii.edu/kbase/crop/type/melo_sp.htm | |
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