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Observations on the Course of Red Ring Disease of Coconuts Caused by the Nematode Rhadinaphelenchus cocophilus (Cobb, 1919) Goodey, 1960 in Naturally Infected Trees*

Published online by Cambridge University Press:  18 November 2009

D. W. Fenwick  and
S. Maharaj
D. W. Fenwick
Affiliation:
Trinidad and Tobago Coconut Research Station, Eastern Main Road, Champs Fleurs, Trinidad W.I
S. Maharaj
Affiliation:
Trinidad and Tobago Coconut Research Station, Eastern Main Road, Champs Fleurs, Trinidad W.I
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Extract

In another publication (Fenwick, 19G3) data are presented on the distribution of infection in coconut trees infected with the nematode Rhadinaphelenchus cocophilus (Cobb, 1919) Goodey, I960. The data favour the hypothesis that the disease can start either in the root system and proceed by upward extension to the stem and thence to the petioles, or alternatively in the upper parts of the tree and proceed by downward extension through the stem to the roots, but this conclusion is arrived at by inference from the condition of trees at one given time. There is no information available on the condition of the trees at any previous time nor on what would have been their condition if allowed to stand. The writers therefore decided to make observations on a number of infected trees at weekly intervals in order to learn more about the course of the disease. To this end, trees were selected in which it was considered that the disease was in an early stage and observe its spread to other parts of the tree.

Type
Research Article
Information
Journal of Helminthology , Volume 37 , Issue 1-2 , March 1963 , pp. 21 - 26
Copyright
Copyright © Cambridge University Press 1963

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References

REFERENCES

Cobb, N. A., 1919.—“A newly discovered nematode Aphelenchus cocophilus n. sp., connected with a serious disease of the Coconut Palm.”W. I. Bulletin, 17, 203–210.Google Scholar
Fenwick, D. W., 1957.—“Red Ring Disease of Coconuts in Trinidad and Tobago.” Colonial Office Report 40017.Google Scholar
Fenwick, D. W., 1963.—“Recovery of Rhadinaphelenchus cocophilus (Cobb, 1919) Goodey, 1960, from coconut tissues.” J. Helminth., 37, 11–14.Google Scholar
Fenwick, D. W., 1963.—“On the distribution of Rhadinaphelenchus cocophilus (Cobb, 1919) Goodey, 1960 in coconut palms suffering from Red Ring Disease.” J. Helminth., 37, 15–20.Google Scholar
Goodey, J. B., 1960.—“Rhadinaphelenchus cocophilus (Cobb 1919) n. comb, the nematode associated with ‘Red Ring’ Disease of Coconut.” Nematologica, 5, 98–102.CrossRefGoogle Scholar