Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance
The effects of defoliation on cowpea, Vigna unguiculata (L.) Walp cv. Ife Brown, were studied in the screenhouse by removing varying proportions of the laminae of leaflets along the transverse plane, to give varying nominal levels of defoliation. Plants subjected once to 25%, 50%, 75% and 100%&n...
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The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria.
2020
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| Urunga tuihono: | https://ija.oauife.edu.ng/index.php/ija/article/view/281 |
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| _version_ | 1810820060556558336 |
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| author | AKINGBOHUNGBE, A. E. |
| author_facet | AKINGBOHUNGBE, A. E. |
| author_sort | AKINGBOHUNGBE, A. E. |
| collection | OJS |
| description | The effects of defoliation on cowpea, Vigna unguiculata (L.) Walp cv. Ife Brown, were studied in the screenhouse by removing varying proportions of the laminae of leaflets along the transverse plane, to give varying nominal levels of defoliation.
Plants subjected once to 25%, 50%, 75% and 100% defoliation at either the primary leaf stage, the first trifoliate leaf stage or the second trifoliate leaf stage, were not adversely affected with respect to days to peak flowering, number of flowers per plant, number of pods per plant as well as number and weight of seeds per plant. However, 100% defoliation significantly delayed the days to first flower production.
When plants were subjected to 25%, 50% and 75% nominal defoliation once a week for a period of three weeks, commencing at the first trifoliate leaf stage, significant treatment effects were observed with the 75% defoliation adversely affecting the number of pods per plant, number and weight of seeds per plant. It was also observed that defoliated leaflets tended to compensate by increasing their widths.
The importance of the results is discussed in relation to the impact of defoliators and recommendations for their control in cowpea production. |
| format | Online |
| id | oai:ojs2.ija.oauife.edu.ng:article-281 |
| institution | My University |
| language | eng |
| publishDate | 2020 |
| publisher | The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria. |
| record_format | ojs |
| spelling | oai:ojs2.ija.oauife.edu.ng:article-2812020-08-26T10:33:27Z Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance AKINGBOHUNGBE, A. E. cowpea, defoliation, Ife Brown, leaf stage, flower production, pods, seeds The effects of defoliation on cowpea, Vigna unguiculata (L.) Walp cv. Ife Brown, were studied in the screenhouse by removing varying proportions of the laminae of leaflets along the transverse plane, to give varying nominal levels of defoliation. Plants subjected once to 25%, 50%, 75% and 100% defoliation at either the primary leaf stage, the first trifoliate leaf stage or the second trifoliate leaf stage, were not adversely affected with respect to days to peak flowering, number of flowers per plant, number of pods per plant as well as number and weight of seeds per plant. However, 100% defoliation significantly delayed the days to first flower production. When plants were subjected to 25%, 50% and 75% nominal defoliation once a week for a period of three weeks, commencing at the first trifoliate leaf stage, significant treatment effects were observed with the 75% defoliation adversely affecting the number of pods per plant, number and weight of seeds per plant. It was also observed that defoliated leaflets tended to compensate by increasing their widths. The importance of the results is discussed in relation to the impact of defoliators and recommendations for their control in cowpea production. The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria. 2020-08-26 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://ija.oauife.edu.ng/index.php/ija/article/view/281 Ife Journal of Agriculture; Vol. 2 No. 2 (1980): Ife Journal of Agriculture; 17-25 0331-6351 eng https://ija.oauife.edu.ng/index.php/ija/article/view/281/176 Copyright (c) 2020 Ife Journal of Agriculture |
| spellingShingle | cowpea, defoliation, Ife Brown, leaf stage, flower production, pods, seeds AKINGBOHUNGBE, A. E. Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title | Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title_full | Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title_fullStr | Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title_full_unstemmed | Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title_short | Artificial defoliation of cowpea (Vigna unquiculata (L.) Walp.) cv. Ife Brown to simulate insect damage: effects on crop performance |
| title_sort | artificial defoliation of cowpea vigna unquiculata l walp cv ife brown to simulate insect damage effects on crop performance |
| topic | cowpea, defoliation, Ife Brown, leaf stage, flower production, pods, seeds |
| topic_facet | cowpea, defoliation, Ife Brown, leaf stage, flower production, pods, seeds |
| url | https://ija.oauife.edu.ng/index.php/ija/article/view/281 |
| work_keys_str_mv | AT akingbohungbeae artificialdefoliationofcowpeavignaunquiculatalwalpcvifebrowntosimulateinsectdamageeffectsoncropperformance |