Integrity Research Journals

ISSN: 2536-7072
Model: Open Access/Peer Reviewed
DOI: 10.31248/JASP
Start Year: 2016

Agronomic performance evaluation of cowpea seeds holed by the cowpea seed bruchids, Callosobruchus maculatus (F.) in the screen house   |   Article Number: 6F515D932   |   Vol.3 (2) - April 2018

Received Date: 16 February 2018   |   Accepted Date: 12 March 2018  |   Published Date: 30 April 2018

Authors:  Adebayo R. A. , Osobase F. I. and Adesina J. M.

Keywords: Agronomic performance, cowpea seeds, Callosobruchus maculatus, emergent hole.

Agronomic performance of Oloyin cowpea seeds holed by Callosobruchus maculatus was evaluated at the Department of Crop, Soil and Pest Management, Federal University of Technology, Akure, Nigeria. Seeds with emergent holes (1, 2, 3 and 4) and seeds without holes were separately sown in five litre plastic buckets filled with sandy loam soil in the screen house and replicated three times. Data on percentage emergence, number of leaves, number of branches, plant height, plant girth, number of pods, number of seeds per pod, pod length and weight of seeds were collected fortnightly for eight weeks and subjected to analysis of variance. Percentage seedling emergence (20%) obtained from seeds with 4 emergent holes was significantly (p<0.05) lower than 86.70% obtained in seeds with one emergent hole. Seeds with 4 emergent holes recorded significantly lower growth parameters. The number of pods were not significantly (p>0.05) affected by the number of emergent holes at 6 and 8 weeks after sowing. Total number and weight of seeds per plot were not significantly different (p>0.05). The study showed that although the agronomic performance of seeds with ≥3 emergent holes was affected during early stage of growth, there were compensatory effects after establishment. Therefore, based on the findings of this study, it is recommended that seeds with ≤4 bruchids emergent holes that are rejected for consumption could be planted instead of total discard.

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