Symptoms-Pathogenicity Coconuts are especially susceptible for 2 years before and after start of fruit bearing. Older and younger trees are more resistant. Trees may die 4 months after first symptoms appear. Roots are similarly discolored, with soft, spongy cortex. Apparent phytotoxin in the red ring.
Damage causes reduction in water uptake by tree.
References Evans, K., D.L. Trudgill, and J.M. Webster. 1993. Extraction, Identification and Control of Plant Parasitic Nematodes. Brathwaite, C.W.D. and M.R. Siddiqi. 1975. Rhadinaphelenchus cocophilus . C.I.H. Descriptions of Plant-parasitic Nematodes.