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Effect of combined and single infections of mosaic and leaf curl viruses on okra (Hibiscus esculentus) growth and yield

Published online by Cambridge University Press:  27 March 2009

G. I. Atiri  and
B. Ibidapo
G. I. Atiri
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
B. Ibidapo
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
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Summary

In field experiments, infections by okra mosaic virus (OMV) and okra leaf curl virus (OLCV) reduced trie growth of okra more than when the plants were infected singly by either virus. The critical growth component responsible for low performance was leaf area in OLCV-infected plants and chlorophyll content in OMV-infected plants. However, the two viruses had a synergistic effect in mixed infection.

Expressed as percentage yield loss, mixed infections significantly reduced edible fresh fruit weight more than single infections in all okra cultivars. In single infections, OLCV caused higher yield loss than OMV. Since both viruses cause more damage in mixed infections, it may be preferable to breed for combined resistance, particularly if the genes for resistance are linked.

Type
Review
Information
The Journal of Agricultural Science , Volume 112 , Issue 3 , June 1989 , pp. 413 - 418
Copyright
Copyright © Cambridge University Press 1989

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