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Item Comparative Assessment of Pathological Condition of Selected Mahogani Trees(University of Ibadan Centre for Sustainable Development, 2014) Onefeli, A.O.; Jegede, O.; Oyedeji, F.; Adegoke, F.; Adegeye, A. O.; Jimoh, S.O.Sustainability of mahogany trees have been threatened by the pandemic of fungal diseases, but Variation exists in the level of occurrence of the diseases among the trees. Thus, diagnosing the level of susceptibility of mahogany to the diseases will be the first step to ameliorating the impact of the diseases on the trees' abundance. This study comparatively investigated the pathological status of selected mahogany trees (Khaya senegalensis and Entandrophfagma cylindricum. Diseased samples of the tree species were collected from a mahogany forest located in Ijebu-Ode, Ogun State, Nigeria. Data were collected through laboratory analysis of the samples and statistically analyzed with the use of ANOVA and t-test at cto.os. Result shows that £. cylindricum is more susceptible to fungal attack by collectotrichum (66.67%), aspergillus (22.22%) and fusarium (18.51%). While in K. senegalensis, the frequency of occurrence (FOC) of the diseases were 62.96%, 14.81% and 14.81% respectively. There was however, no significant different in the FOC of the two species. ßut on utility, it is better tö adhere to K. senegalensis:it has less pathological weaknessItem Drought stress on early growth of Diospyros mespiliformis Hochst ex A. Rich in Jega, Northern Nigeria(Ecological Society of Nigeria, 2012) Olajuyigbe, S. O.; Jimoh, S. O.; Adegeye, A. O.; Mukhtar, R. B.Trees face rising drought stress and mortality with global warming and it is vital that adequate information is available on the tolerance levels of tree species. In 2012, seedlings of Diospyros mespiliformis Hochst ex A. Rich were evaluated for response to varied levels of water availability at the Aliero Teaching and Research Farm, Kebbi State University of Science and Technology, Jega, Kebbi State, Nigeria. Twelve uniformly growing potted seedlings were selected and exposed to four watering frequencies (daily, once in three days, weekly and fortnightly) in a screen house. For each watering event, 200 ml of water was administered to the soil of each potted seedling. Seedling height and collar diameter were measured, while number of leaves were counted fortnightly for 16 weeks. The data were analysed using descriptive statistics and analysis of variance, at p<0.05 level of significance. A hundred percent survival rate was observed in all treatments. Seedlings that were watered daily had the highest height (13.53 ± 2.66 cm) and collar diameter (3.41 ± 0.44 mm). The treatments resulted in 283%, 133%, 98% and 125% increase in height, as well as 100%, 89%, 57% and 40% increase in collar diameter of seedlings watered daily, once in 3 days, weekly and fortnightly, respectively. Time of experiment had a significant influence on the height and collar diameter growth of seedlings in the four treatments while watering frequency only had a significant effect on collar diameter of the seedlings, after 16 weeks. However, posthoc analysis showed that only the collar diameter of daily watered seedlings differed from other treatments. Although, delayed watering reduced the rate of growth, it did not hinder it. The least watered seedlings had the lowest number of leaves (6) after 16 weeks. The study showed that fortnight supply of water was sufficient for the early growth and development of D. mespiliformis seedlings. The apparent drought tolerance of the species may be an indication of a good candidate species for plantation establishment under dry and warm conditions which are imminent in the event of climate changeItem Agricultural productivity under taungya and non-taungya land-use options: a case study of Vandeikya Local Government area, Benue State, Nigeria(International Formulae Group, 2011) Adegeye, A. O.; Jimoh, S. O.; Agera, S. I.Taungya farming is a special arrangement between the forestry department and farmers, which combines the production of both arable and forest tree crops simultaneously on a piece of land. The practice was adopted in Vandeikya Local Government area of Benue State Nigeria, in mid 1950s up to 2000. This study evaluated the method as an option for food and fiber production compared to the traditional farming and forest management practices. Using Stratified random sampling, two sets of questionnaire were used to appraise the productivity of some arable crops and forest regeneration under taungya and non-taungya cultural practices. The yields of arable crops were significantly higher under taungya farming that in non-taungya plots in the study area. There was however no significant difference in the total forest area regenerated under the two landuse systems. The apparent land hunger among farmers is a favourable factor for adoption of taungya as a land use option in the study area. There is need to adopt multi-species planting approach in future programmes. Also, the land tenure system which limits access to land by strangers needs to be reviewed and greaterawareness on the programme needs to be generated among the farmers and forestry staff alike.Item Survey of biodegrading agents in logs and planks in selected sawmills and timber markets in Ibadan Oyo State(Forestry Association of Nigeria, 2015) Omole, A. O.; Adegeye, A. O.; Jemide, O.Biological deterioration of wood is one of the major challenges on wood utilization especially in tropical countries like Nigeria. This is because of the favourable weather condition for the bin-deteriorating agents to thrive. This study is therefore carried out to investigate the biodegrading agents of logs in sawmills and planks in plank markets in Ibadan, Nigeria. Data for the study were collected using checklist, and laboratory examination of collected samples from decayed logs and planks. The data obtained were subjected to descriptive statistics. The results of the laboratory examination revealed that a variety of fungi moulds, namely Aspergillus flavus Fredrick Link, Aspergillus niger VanTieghem, Botryodiplodia theobromae Pat, Trichodermalongi brachlatum Rifai, Penicillium oxalicum Currie and Thorn, Rhizopus stolonifer,(Ehrenb.ex Fr)., that are not host specific were encountered. Botryodiplodia theobromae Pat, was present in all the three sawmills and two timber markets while Aspergillus flavus Fredrick Link and Aspergillus niger VanTieghem, were present in only one sawmill (Moniya). The order Coleoptera and Isoptera were the two prominent insect pest groups identified. These were from seven families out of which five species of insects namely Termites, Beetles, Borers, Weevils and Carpenter ants were identified. The degree of molds growth on the surface of the wood is an indication that the conditions are favourable for wood decay to occur. It is therefore recommended that logs should be properly handled during log storage and processing in the mills by keeping the environment clean. Processed timbers should also be arranged in such a way that there will be free flow of air within stacked timber.