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Effects of Artificial Defoliation (Simulating Pest Damage) on Varieties of Upland Rice

Published online by Cambridge University Press:  03 October 2008

W. E. Taylor
W. E. Taylor
Affiliation:
Njala University College, University of Sierra Leone, P. M. B. Freetown
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Summary

Artificial defoliation was used to simulate grazing by cutting-grass or cane-rat (Thryonomys swinderianus), on three rices with durations of 110–115, 130–135 and 140–145 days respectively, defoliated before, during and soon after tillering by removing leaves to half, two-thirds and the total height of the plants. All varieties showed marked compensatory growth, resulting in increased tillering and yield, especially when defoliated during tillering, but yield fell when foliage was removed after tillering, especially with shorter duration rice. Defoliation to half the height of the plant during tillering had the most beneficial effect, whereas removal of all leaves to soil level after the tillering stage had the most adverse effect.

Type
Research Article
Information
Experimental Agriculture , Volume 8 , Issue 1 , January 1972 , pp. 79 - 83
Copyright
Copyright © Cambridge University Press 1972

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