International Journal of Agricultural Policy and Research Vol.1 (10),pp.305-310,December 2013
Available online at https://www.journalissues.org/journals/ijapr/
© 2013 Journal Issues ISSN 2350-1561
Article ID JPR100, 06 pages
Original Research Paper
Evaluation of Moringa oleifera powders for the control of bruchid beetles during storage
Accepted 31 October 2013
*Adenekan, M. O., Okpeze, V.E., Ogundipe, W.F., and Oguntade, M.I.,
Federal College of Agriculture, Institute of Agricultural Research and Training, Moor Plantation, P. M. B. 5029, Ibadan. Oyo State, Nigeria.
*Corresponding author E-mail: email@example.com
The present study evaluated the insecticidal effects of powders of Moringa oleifera from different plant parts for the control of bruchid beetles in cowpea seeds under ambient condition of temperature and relative humidity (30°C and 72%). A synthetic pesticide (Pirimiphos-methyl) and four Moringa oleifera plant powders (leaf, stem, root and flower) were tested in cowpea seeds infested with virgin adults of bruchid beetles using completely randomized design. The results obtained showed a significant difference in the eggs laid, ecloded and the number of adults that emerged from each treatment (P = 0.05). The lowest mean number of eggs of 6.40 was laid when 0.5 g Moringa oleifera flower powder was applied, which was significantly different from the control treatment where no plant product was applied. Similarly, the highest number of eggs hatched of 43.31 was recorded in the control treatment, which was also significantly different from the mean eggs hatched of 2.64 and 0.31 obtained when the leaf and flower powders were applied respectively (P = 0.05). The results obtained also revealed a significant effect in the mean number of adults that emerged at various treatments applied with different plant part powders. The total developmental period of 23.5 days was obtained at the control which was significantly reduced to 16.3 days and 17.3 days when stem and leaf powders were applied respectively. The highest percentage of mortality 100 % was recorded in the treatment when Actellic dust was applied, whereas the mortality percentages were 85 and 70 % within the twenty-four hours of the insect infestation. This showed that the flower of Moringa oleifera powder could be used as bio-insecticide for the control of bruchid beetles in cowpea seeds during storage.
Key words: Cowpea, oviposition, eclosion, Moringa, Callosobruchus, maculatus, Pirimiphos-methyl