Showing papers by "Makerere University published in 1986"
TL;DR: The author has suggested that new sets of data are required for insect pest management in agroforestry systems because the bio-ecological factors governing the population dynamics of the insect pests in the two systems are not necessarily the same.
15 citations
TL;DR: In this paper, a power regression analysis of cedar bark samples and deposition samples in the Nagatsuta area, Yokohama, Japan, showed that there is contamination by heavy metals, Cr, Zn, Cu and Pb, as indicated by enrichment factor values, particularly in the parts adjacent to the highway.
11 citations
9 citations
6 citations
TL;DR: Evidence deduced from the rate of nymphal issuance and the mean number of light yellow eggs at any given time, suggested that ovulation, embryogenesis and eclosion are probably synchronized biological activities in Orthezia.
Abstract: Simultaneously or selectively, nymphs and adults of Orthezia insignis used physiological age of the host-units, the relative sizes of sap pathways and the concentration of photosynthates to choose feeding and/or oviposition sites, depending on the state of the host plant. On the non-flowering plants, physiological age and relative sizes of pathways were the principal determinants, while on flowering food plants all the three criteria were used although the sink-photosynthate-concentration factor had a decidedly dominant influence on Orthezia than otherwise.
6 citations
5 citations
TL;DR: The modified enzyme-linked immunosorbent assay (ELISA) was used to determine the relative quantities of class-specific antibodies to Pasteurella haemolytica and the indirect antibody ELISA was found to be superior to the indirect bacterial agglutination (IBA) technique for determining antibody titres.
3 citations
TL;DR: The periodicity in patterns of leafing and reproduction of food species is important in that it directly affects the availability of colobus food items.
Abstract: ummary
Phenological observations were recorded for 11 months from Celtis durandii and Markhamia platycalyx, two of the top-ranking food species of the red colobus (Colobus badius tephrosceles) and the black-and-white colobus (Colobus guereza occidentalis) at Kanyawara, Kibale Forest (Uganda). Observations were made on ten selected individuals of each species. Celtis durandii lost its leaves once a year in the dry season, after which it stood bare for less than a month. Flowering occurred when the canopies were leafless. For M. platycalyx, flushing and leaf shedding were continuous activities, but flower buds were rare and flowers were never observed. The periodicity in patterns of leafing and reproduction of food species is important in that it directly affects the availability of colobus food items.
Resume
Durant onze mois, des observations phenologiques furent relevees sur Celtis durandii et Markhamia platycalyx, deux des especes favorites consommees par le colobe bai (Colobus badius tephrosceles) et le colobe magistrat (Colobus guereza occidentalis) a Kanyawara, Kibale Forest (Ouganda). Les observations furent realisees sur dix individus selectionnes de chaque espece. Celtis durandii perd annuellement ses feuilles en saison seche et reste ainsi denude durant moins d'un mois. La floraison survient alors que la couronne est sans feuilles. Chez M. platycalyx, l'apparition et la chute des feuilles sont continues, mais les boutons floraux sont rares et les fleurs jamais observees. La periodicite des types de foliaison (?) et de reproduction d'especes alimentaires est importante dans la mesure ou elle affecte directement la disponibilite de nourriture pour les colobes.
3 citations
01 Jan 1986
TL;DR: In this paper, the authors outlined early endeavors for the implementation of biogas-related activities in Uganda, including extension to rural areas, and plans have been initiated for implementation.
Abstract: Until 1979, the biogas-related activities in Uganda were mostly confined to basic laboratory-scale studies. After that, however, clearly applied objectives, including extension to rural areas, have been set and plans have been initiated for implementation. Such early endeavors are outlined in this presentation.
1 citations
TL;DR: On the non-flowering plants, physiological age and relative sizes of pathways were the principal determinants, while on flowering food plants all the three criteria were used although the sink-photosynthate-concentration factor had a decidedly dominant influence on Orthezia than otherwise.
Abstract: Simultaneously or selectively, nymphs and adults of Orthezia insignis used physiological age of the host-units, the relative sizes of sap pathways and the concentration of photosynthates to choose feeding and/or oviposition sites, depending on the state of the host plant. On the non-flowering plants, physiological age and relative sizes of pathways were the principal determinants, while on flowering food plants all the three criteria were used although the sink-photosynthate-concentration factor had a decidedly dominant influence on Orthezia than otherwise.
1 citations
TL;DR: The nicotinium molybdophosphate resin technique is extended to the analysis of environmental samples collected in different areas of Kampala City and for complex synthetic mixtures of them.
Abstract: The purpose of this study was to measure absorption properties of nicotinium molybdophosphate and to test extraction and recovery procedures for different metal pollutants (e.g. Cd, Cr, Cu and Pb). Procedures have been tested for single metal pollutants and for complex synthetic mixtures of them. Furthermore the nicotinium molybdophosphate resin technique is extended to the analysis of environmental samples collected in different areas of Kampala City.