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Effects of Rice Stem-Borer Infestation on Grain Yield and Yield Components

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Abstract

Greenhouse studies were conducted by artificially infesting potted rice plants with first instar larvae of Maliarpha separate/la and Sesamia botanephaga Tarns and Bowden at two stages of plant growth, namely: early tillering stage and at the booting stage. Early infestation by M. separatella resulted in reduction of plant height and the number of filled grains. At the booting stage, the number of filled grains and their weight were higher in uninfested plants. Infestation by S. botanephaga at both stages of plant growth mainly affected the number of productive tillers. Grain weight was unaffected. Field studies on individual hills gave erratic results and there were instances when hills containing tillers bored by M. separatella produced higher yields than unattacked hills.

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Authors and Affiliations

  1. West Africa Rice Development Association (WARDA), P.O. Box 1019, Monrovia, Liberia

    E. A. Akinsola

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  1. E. A. Akinsola
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Akinsola, E.A. Effects of Rice Stem-Borer Infestation on Grain Yield and Yield Components. Int J Trop Insect Sci 5, 91–94 (1984). https://doi.org/10.1017/S1742758400001715

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  • DOI: https://doi.org/10.1017/S1742758400001715

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