Browsing by Author "Adenuga, T."

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Oil palm inflorescence (Elaeis guineensis Jacq.) ash and pirimiphos-methyl dust application for control of Oryzaephilus surinamensis infestation on stored date palm fruit (Phoenix dactylifera)
(Taylor & Francis, 2013-12) Popoola, K. O. K.; Adenuga, T.
The efficacies of male oil palm inflorescence ash (OPIA) and pirimiphos-methyl dust (PMD) were assessed for possible control of Oryzaephilus surinamensis infestation of the date palm fruit Phoenix dactylifera. Male OPIA at concentrations of 0.625 g/25 g of fruit and 1.25 g/25 g as well as PMD at the prescribed dosage of 0.0125 g/25 g were tested on pristine and simulated dates using four replicates per treatment for exposure periods of 5 and 10 weeks. Efficacy was measured on the rate of mortality and emergence of O. surinamensis at various development stages. Results showed increased larval and adult mortality on both pristine and simulated dates and decreased larval and adult emergence of the pest exposed to 1.25 g of OPIA. Five days exposure to PMD recorded a significantly high mean mortality of adult O. surinamensis and no emergence. The authors concluded that exposure to OPIA at the concentration of 1.25 g/25 g for five weeks could be used in possible control of O. surinamensis infestation of palm date fruit with mechanical damages during storage.
Safe guarding date palm from oryzaephilus surinamensis infestation through oil palm inflorescence ash and hermetic storage technique treatments and the combination of both treatments
(2013) Popoola, K. O. K.; Adenuga, T.
Possible control of Oryzaephilus surinamensis infestation on date palm (Phoenix dactylifera) using oil palm inflorescence ash and hermetic storage technique combined with Oil Palm Inflorescence Ash (OPIA) treatment were conducted in the Entomology Laboratory, Department of Zoology, University of Ibadan, Oyo state, Nigeria. Relative efficacy of oil palm inflorescence ash at 0.625 g /25 g and 1.25 g /25 g and 3 bags layer hermetic storage technique combined with oil palm inflorescence ash 0.625 g/25 g and 1.25g/25 g were tested on pristine and simulated date. The experiments were laid out in a completely randomized design and each treatment replicated four times for 5 and 10 weeks exposure periods. Result showed that oil palm inflorescence ash recorded adult mortality of (10.00±0.00)and (9.00±0.41) at 1.25 g, while (8.00±1.68) and (7.00±0.71) were recorded at 0.625 g after five weeks of exposure on both pristine and simulated date respectively. At 1.25 g concentration, reductions in larval and adult emergence were recorded. Combination of 3 bags layer hermetic storage technique with oil palm inflorescence ash treatment was highly effective with higher adult mortality, lower larval and adult emergence. Combined treatment of oil palm inflorescence ash and hermetic storage technique was found to have significant difference when compared to only oil palm inflorescence ash treatment at p<0.05, ANOV A. It is evident from this study that it may be necessary to combine hermetic storage technique with oil palm inflorescence ash to achieve a more effective control on dried date palm against O. surinamensis infestation during storage for a storage period often weeks.