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Articles by B.N. Iloba
Total Records ( 3 ) for B.N. Iloba
  N.O. Erhunmwunse , B.N. Iloba and A.R. Dirisu
  The Recovery rate (Rr) of eight orders of soil microarthropods present in the soil during the period of the field experiment were investigated for a period of 90 days after the application of carbofuran insecticide at a depth of 0-5 cm. The Rr for Acarina (9.0x10-5 sec-1 for double treated plot and 1.02x10-5 sec-1 for single treated plot) and Coleopteran (5.0x10-6 sec-1 for double treated plot and 2.3x10-6 sec-1 for single treated plot) were the highest due to the nature of their exoskeletons and the effect of the carbofuran insecticide on other predators. The Recovery rate (Rr) of Hymenoptera (H) and Thysanoptera (TH) were the lowest observed during this period of investigation: HRr = 4.0x 10-7 sec-1, THRr = 3.0x 10-7 sec-1. There was no significant difference (p>0.05) in the Recovery rate (Rr) of soil microarthropod caught in the double treated plots to single treated plots. The correlation between the Total Hydrocarbon Content (THC) and the total number of soil microarthropods caught at both treatment were significant at 0.05 and 0.01 probability level with r = -0.96 for double treated plots and - 0.75 for the single treated plots. The implication of the above statement shows that the reductions of THC lead to the increase in the soil microarthropods.
  B.N. Iloba and T. Ekrakene
  The powders of the leaves of H. suaveolens, O. gratissimum and Azadirachta indica were assessed for their daily effect against Sitophilus zeamais Mots infesting maize grains (Zea mays) and Callosobruchus maculatus Fab infesting cowpea seeds. The powders were tested at 1.5, 2.5 and 3.5 g/80 g of food materials. The results revealed that, daily mortality of Sitophilus zeamais was dependent on concentration with maximum kills occurring on day 3 of exposure. Mortality of S. zeamais was either absent or minimal on the first two days of exposure. This however, contrasted the pattern of mortality exhibited by Callosobruchus maculatus which showed a negative daily mortality with increased concentrations compled with maximum daily mortality occurring in the first two days of exposure.
  T. Ekrakene and B.N. Iloba
  The decomposition processes of 48 white pigs (Sus scrofa Linnaeus) with mean weight of 22.3±1.20 kg (Mean±SD) resulting from four death agents (oxygen deprivation, slaughtering, aluminium phosphide and monocrotophos poisonings) was monitored throughout the Wet and Dry seasons of 2006/2007 and 2007/2008 seasons at Benson Idahosa University Demonstration farm, Benin City on Latitude 06°17'01.6"N and Longitude 05°36'10.6"E, 73 m of elevation from sea level. The insect fauna and periods of invasions were recorded. A consistent pattern of decomposition and insect invasion in both the dry and wet seasons regardless of killing agents was observed. The consistent insects from the earliest to the latest arrival being; Lucilia sericata; Chrysomya rufifacies, Musca domestica, Sarcophaga carnaria, Hermetia illucens and Ophyra aenescens from the order Diptera; Dermestis maculatus and Necrobia rufipes from the order Coleoptera. The other insect order, Hymenoptera was represented by members of the Formicidae (ants) family which was opportunistic. It also revealed that, the insects’ species that bred (Lucilia sericata, Chrysomya rufifacies, Musca domestica, Sarcophaga carnaria, Hermetia illucens, Ophyra aenescens and Dermestis maculatus) within the decomposition process in either seasons, all had one complete generation (egg, larva, pupa and adult or larva, pupa and adult) without an emerged adult from the process initiating and completing another cycle. This suggests that, the phenomenon of decomposition of animals is predictable from insect evidences since carrion insects seem to be decomposition-stage dependent, with only one generation of such insects’ species guaranteed, except where unpredictable circumstances present themselves. This understanding would enhance the global acceptability and applicability of testimonies from entomological data.
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