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Articles by A.A. Osipitan
Total Records ( 2 ) for A.A. Osipitan
  A.A. Osipitan , O.Y. Babalola and O.A. Lawal
  The study evaluated a method termed “top bar spacing” in Kenya top bar hives to stimulate propolis collection by worker bees from tree buds at University of Agriculture, Abeokuta (UNAAB). Ogun State, Nigeria and Olupakun village, Abeokuta, Ogun State, Nigeria. There were four treatments: hives with top bars spaced at 0.2, 0.4, 0.6 and 0.8 cm. Hives with closely-spaced top bars served as control. The studies were conducted between August 2008 and March, 2009 and repeated between August 2009 and March, 2010. The honey yield, propolis yield, weight of dry pressed comb, number of ripe harvested combs and number of unriped combs were significantly (p<0.05) higher in year 2010. Likewise, the honey yield, propolis yield, weight of dry pressed comb, number of ripe harvested combs and number of unriped combs were significantly(p<0.05) higher in Olupakun village. The propolis collected in hives with spaced top bars were significantly (p<0.05) higher than propolis in hives with closely-spaced top bars. The honey yield, weight of dried pressed comb and number of ripe harvested combs were significantly (p<0.05) lower in hives with differently-spaced top bars. The study shows that a method of “top bar spacing” could stimulate collection of propolis from botanical sources by worker bees. This method could therefore be used by bee keepers with bias for propolis marketing to gather propolis.
  A.A. Osipitan and A.E. Oseyemi
  Macrotermes spp. are members of the fungus-growing sub-family Macrotermitinae. They are mostly mound building and are the largest termite species. Macrotermes spp. build large epigeal nests (mounds) from where they forage outwards to distances up to 50 m in galleries/runways. In Africa, Macrotermes are serious pest of some agricultural crops and tree plantations that is responsible for the majority of crop damage and 90% of tree mortality in forestry. Damage by termite to store products also provides entry for secondary infection by pathogens especially Aspergillus, which cause indirect yield loss and contamination of products with aflatoxins. Many plants have however, developed effective defenses against termites. This study evaluated the bio-activity of aqueous extracts from citrus: Citrus sinensis, cocoa: Theobroma cacao, sunflower: Tithonia diversifolia and cashew: Anacardium occidentale for the management of Macrotermes bellicosus on the field and in the laboratory. The results showed that extracts from the plants caused 80-100% mean insect mortality 10 h after insect exposure and have repellence values between 26.67 and 60%. T. cacao, A. occidentale, T. diversifolia and C. sinensis are viable options for environmentally friendly management of M. bellicosus on the field.
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