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Evaluation of <i>Piper guineense</i>in the Control of Cowpea Storage Weevils: Implication for Sustainable Credit Advancement

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Agricultural Sciences 2019年第4期10卷 530-537页

作者： Gabriel Adedotun Sunday Benson Abiodun Oladipupo Joda Olufemi Sunday Sosanya Babajimi Olumide Tokoya School of Agriculture Lagos State Polytechnic Ikorodu Nigeria Olabisi Onabanjo University Ago-Iwoye Nigeria Central Bank of Nigeria Abuja Nigeria

The Central Bank of Nigeria Anchored Borrowers Programme efforts geared towards massive production of cowpea and sustainable food security is challenged with post-harvest losses especially due to insect pest infestation in storage. So also, chemical method of pest control posed more health and ecological challenges than food insecurity. This work investigated the effect of Piper guineense on cowpea storage weevil at the agronomy laboratory of the Lagos State Polytechnic, Ikorodu. Contact toxicity of P. guineense at 0.2, 0.4, 0.6, 0.8 and 1 g per 20 g of cowpea seeds in test tubes including a control was observed. The treatment materials exhibited significant efficacy from 24 hours after infestation. P. guineense at 1 g concentration significantly reduced the oviposition potential, egg hatching rate, holes and emergence of adult Callosobruchus maculatus on treated seeds. The powders caused chronic toxicity and inhibit development. All the responses were found to be concentration dependent. Increasing rates of P. guineense increased performance. The implication of these results is discussed and recommendations proffered.

关键词： Concentration Cowpea Efficacy Storage Weevil Piper guineense

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Seed Germination and Effects of Three Watering Regimes on the Growth of <i>Dialium guineense</i>(Wild) Seedlings

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American Journal of Plant Sciences 2014年第20期5卷 3049-3059页

作者： O. Olajide A. A. Oyedeji G. S. Tom J. Kayode Department of Forestry and Wildlife Faculty of Agriculture University of Uyo Uyo Nigeria Plant Science Unit Department of Biological Sciences Niger Delta University Wilberforce Island Bayelsa State Nigeria Department of Environmental and Analytical Sciences Faculty of Science and Engineering University of Wolverhampton Wolverhampron UK Department of Plant Science Faculty of Science Ekiti State University Ado-Ekiti Nigeria

The effectiveness of three pre-germination treatments in breaking dormancy of the seeds of Dialum guineense and effects of three watering regimes on the growth performance of the seedlings were investigated. The pre-germination treatments were: soaking in hot water for 10 seconds and cooling down in cold water (T1), soaking in cold water for 24 hours (T2), soaking in running water for 48 hours (T3) and control (T4), while watering regimes include: watering once daily in the morning (W1), watering once every two days in the morning (W2) and watering once every three days in the morning (W3). The results showed that germination occurred first at 5 days after sowing (5 DAS) among the seeds soaked in cold water for 24 hours before sowing (T2), while the untreated seeds (control) took the longest period of 12 days before germination occurred. T1 had the highest germination value of 49.6% while T3 had the least of 31.2%. The effects of watering regimes were found to be significantly different on stem-collar diameter, leaf area and total dry weight (P guineense seeds and watering interval of three days would not dispose the seedlings to water-stress.

关键词： Dialium guineense Seeds Dormancy Pre-Germination Seedlings Growth Watering Regimes

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