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Effect of Leaf Removal on the Growth And Yield of Okra (Abelmoschus Esculentus) and its Relevance to Leaf Harvesting Patterns and Pest Damage

Published online by Cambridge University Press:  03 April 2017

F. O. Olasantan*
Affiliation:
Department of Agriculture, Oyo State College of Education, Ila-Orangun, Nigeria

Summary

Experiments on okra to determine the economic loss caused by insect damage to the leaves or by harvesting young leaves as a vegetable are described. Leaf harvests at 1-weekly intervals yielded 30-50% more fresh leaf than harvests at 2 or 3-weekly intervals. Removing a quarter of each leaf or single leaves from the upper or lower parts of the plant at 3-weekly intervals did not affect marketable fruit yield, but yield was reduced by about 30% when one young leaf was harvested at 1 or 2-weekly intervals or when two or three leaves were harvested at S-weekly intervals. Removing more than one quarter of each leaf or two or three fully expanded leaves from the lower three-quarters of the plant at 3-weekly intervals also caused up to 40% yield loss.Harvesting single leaves at S-weekly intervals is therefore recommended if okra is to be grown for both leaves and pods. The plant can tolerate at least 25% defoliation, as can happen with insect damage, before any yield loss occurs.

F. O. Olasantan: Efecto de la deshojadura sobre el crecimiento y rendimiento del gombo (Abelmoschus esculentus,) y su importancia para modelos de cosecha de hojas y dano causado porplagas.

Resumen

Resumen

Se describen experimentos realizados con el gombo para determinar la pérdida ecónomica causada por daños a las hojas provocados por insectos o por cosechar hojas nuevas como hortaliza. Cosechas de hojas en intervalos de 1 semana rendieron un 30-50% ás de hoja nueva que cosechas en intervalos de 2 ó 3 semanas. Quitando un cuarto de cada hoja o una sola hoja entera de la parte superior o inferior de la planta en intervalos de 3 semanas no afectó el rendimiento de frutas comercializables, pero el rendimiento fue reducido en un 30% aproximadamente al cosecharse una hoja nueva en intervalos de 1 ó 2 semanas, y al cosecharse 2 ó 3 hojas en intervalos de 3 semanas. El quitar más de una cuarta parte de cada hoja o dos o tres hojas totalmente desarrolladas de las tres cuartas partes inferiores de la planta en intervalos de 3 semanas también provocó una reductión del rendimiento de hasta el 40%. Por lo tanto, se recomienda la cosecha de una sola hoja en intervalos de 3 semanas si ha de cultivarse el gombo para obtener tanto hojas como vainas. La planta puede tolerar por lo menos el 25% de defoliation, como puede ocurrir con el daño provocado por insectos, antes de implicar una dismunución del rendimiento.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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References

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