IIARD International Institute of Academic Research and Development

RESEARCH JOURNAL OF PURE SCIENCE AND TECHNOLOGY (RJPST )

E-ISSN 2579-0536
P-ISSN 2695-2696
VOL. 7 NO. 1 2024
DOI: https://doi.org/10.56201/rjpst.v7.no1.2024.pg82.95

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The Effect of Concentration Rate and Variety on the Mortality of Weevils (Callosobruchus maculatus) in stored Cowpea at Makurdi, Benue State, Nigeria

Iyough,D. D., Madina, P. and Siki M. D

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Abstract

The study was conducted at Strategic Grain Reserve (SGR), Federal Ministry of Agriculture Makurdi. SGR is located in Makurdi the administrative headquarter of Benue state, lies approximately between latitude 7o44’N and longitude 8o 54’E. The town is located along the coast of the River Benue. The objective of this project was to examine the effect of plants extracts, Neem leaf powder on cowpea weevils as an alternative for preserving cowpea at storage at Makurdi. The design of the experiment was 2×3×4 factorial in a completely randomized design (CRD) with three replications. The experiments were setup using non- infested cowpea seeds. Neem plant powder was used against two cowpea cultivars. The experiment contains 24 treatments, the powders weighing 5g were used against 100g cowpea seeds and the untreated control. Data collected included; Bruchid mortality, population of progeny, number of perforated seeds, seeds weight, Germination percentage and seedlings establishment at 4 weeks and 12 weeks. Significant difference (P<0.05) was recorded on cowpea variety and plant extracts where Sampea 11 (white cowpea) recorded high bruchid mortality, seed weight and seedling establishment with low number of perforated seeds and Sampea 12 (brown cowpea) having high germination percentage. On concentration, 3.0g recorded the high mortality, seed moisture, and seedling establishment with low number of perforated seeds on the other hand Neem extracts recorded the lowest in seed weight loss. Hence, Sampea 11 (white cowpea) variety shows superiority over Sampea 12 (brown cowpea) variety in bruchid mortality, seed weight and seedling establishment and low number of perforated seeds over Sampea11. While sampea 12 also outperformed sampea11 in

keywords:

Plant extracts, Concentration, Control, and Bruchid

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References:

Abd El-Aziz and Shadia, E. (2001). Persistence of some plant oils against the bruchid beetle,
Callosobruchus maculates F. (Coleoptera: Bruchidae) during storage. Journal of
Agricultural Science, 9(1): 423 – 432.

Abraham, T., and Basedow, T.H., (2005). Laboratory and field studies on the effect of natural
control measures against insect pests in stored maize in Ethiopia. Journal of Plant
Diseases and Protection, 112 (2):156–172.

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