Browsing Environmental Health by Issue Date

Now showing items 1-20 of 185

Multitrophic Interaction Facilitates Parasite–host Relationship Between an Invasive Beetle and the Honey Bee.

Torto, Baldwyn; Boucians, Drion G.; Arbogast, Robert T.; Tumlinson, James H.; Teal, Peter E. A. (PNAS, 2007)

Colony defense by honey bees, Apis mellifera, is associated with stinging and mass attack, fueled by the release of alarm pheromones. Thus, alarm pheromones are critically important to survival of honey bee colonies. Here ...
Semi-captive Rearing of the African wild Silkmoth Gonometa postica (Lepidoptera: Lasiocampidae) on an Indigenous and a Non-indigenous Host Plant in Kenya

Ngoka, Boniface M.; Kioko, Esther N.; Raina, Suresh K.; Mueke, Jones M.; Kimbu, David M. (International Centre of Insect Physiology and Ecolopgy, 2007)

The life cycle of the African wild silkmoth Gonometa postica Walker was studied between September 2000 and September 2001 in the Uasin Gishu District of western Kenya with Acacia mearnsii deWild and Acacia hockii deWild ...
Trapping of Aethina tumida Murray (Coleoptera: Nitidulidae) from Apis mellifera L. (Hymenoptera: Apidae) Colonies with an In-Hive Baited Trap

Torto, Baldwyn; Arbogast, Richard T.; Engelsdorp, Dennis van; Willms, Steven; Purcell, Dusti; Boucians, Drion; Tumlinson, James H.; Teal, Peter E. A. (International Centre of Insect Physiology and Ecolopgy, 2007)

The effectiveness of two lures for trapping the small hive beetle, Aethina tumida, by means of in-hive traps was tested by Þeld trials in apiaries located in Florida, Delaware, and Pennsylvania during 2003Ð2005. Both lures ...
Larvae, cocoon and post-cocoon characteristics of bombyx mori L. (lepidoptera: bombycidae) fed on mulberry leaves fortified with Kenyan royal elly

Nguku, E. K.; Mulie, M.; Raina, S. K. (JASEM, 2007)

Fourth instar Bombyx mori silkworm larvae were fed on mulberry leaves to which royal jelly had been added. The impact on the larval, cocoon, shell and pupal weight, shell ratio percentage, filament length and weight, and ...
Evaluation of Raw Silk Produced by Bivoltine Silkworm Bombyx mori L. (Lepidoptera: Bombycidae) Races in Kenya.

Nguku, E. K.; Adolkar, V. V.; Raina, S. K.; Mburugu, K. G.; Mugenda, O. M. (JTATM, 2007)

Evaluation of raw silk produced in location S1 (laboratory) and S2 (field) was assessed during long rains (LR) and short rains (SR), using...(continue from the attached pdf)
Bacterial diversity in the intestinal tract of the funguscultivating termite Macrotermes michaelseni (Sjöstedt)

Mackenzie, Lucy Mwende; Muigai, Anne Thairu; Osir, Ellie Onyango; Lwande, Wilber; Keller, Martin; Toledo, Gerardo (Academic Journals, 2007)

Microorganisms in the intestinal tracts of termites play a crucial role in the nutritional physiology of termites. The bacterial diversity in the fungus-cultivating Macrotermes michaelseni was examined using both molecular ...
The butterfly Danaus chrysippus (Lepidoptera: Nymphalidae) in Kenya is Variably Infected with Respect to Genotype and Body Size by a Maternally Transmitted Male-killing Endosymbiont (Spiroplasma)

Herren, Jeremy A.; Gordon, Ian; Holland, PeterW. H.; Smith, David (International Centre of Insect Physiology and Ecolopgy, 2007)

Female-biased sex ratios in Danaus chrysippus (Linnaeus) (family Nymphalidae, subfamily Danainae, tribe Danaini) populations are attributed to the action of an endosymbiotic ‘male-killer’ bacterium of the genus Spiroplasma. ...
Evaluation of Various Mulberry Morus spp. (Moraceae) Cultivars for the Rearing of the Bivoltine Hybrid Race Shaanshi BV-333 of the silkworm Bombyx mori (Lepidoptera: Bombycidae)

Adolkar, V. V.; Raina, S. K.; Kimbu, D. M. (International Centre of Insect Physiology and Ecolopgy, 2007)

The performance of the Bombyx mori Linnaeus bivoltine hybrid, Shaanshi BV-333, was evaluated on six mulberry cultivars of Morus spp. based on economic characters in rearing and mulberry leaf quality. The growth rate and ...
Stingless Bees in Kenya.

Macharia, Joseph; Raina, Suresh; Muli, Elliud (Caribbean Update: Guyana, 2007)

The Commercial Insects Projector the International Center of Insect Physiology and Ecology, Icipe is investigating beekeeping with stingless bees, meliponiculture....(continue from the attached pdf)
Identification of Insect-selective and Mammal-selective Toxins from Parabuthus leiosoma Venom

Ochola, John B.; Lwande, Wilber; Thiong’o, Thuku; Rogo, Lucie; Herrmann, Rafael; Schepers, Eric; Bagine, Richard; Mungai, Paul; Ndiege, Isaiah O. (Elsevier, 2007)

Venoms were collected from two scorpion species: Parabuthus leiosoma and Parabuthus pallidus from Kenya. Subcutaneous injection and oral toxicity tests of crude and pure fractions of scorpion venoms were done in Mus ...
The Antiplasmodial Activity of Spermine Alkaloids Isolated from Albizia gummifera

Rukunga, G.M.; Muregi, F.W.; Tolo, F.M.; Omar, S.A.; Mwitari, P.; Muthaura, C.N.; Omlin, F.; Lwande, W.; Hassanali, A.; Githure, J.; Iraqi, F.W.; Mungai, G.M.; Kraus, W.; Kofi-Tsekpo, W.M. (Elsevier, 2007)

In the present study the methanolic extract of Albizia gummifera was fractionated into various fractions. These fractions were tested against choroquine sensitive (NF54) and resistant (ENT30) strains of Plasmodium falciparum. ...
Spatial Distribution of Cocoon Nests and Egg Clusters of the Silkmoth Anaphe panda (Lepidoptera: Thaumetopoeidae) and its Host Plant Bridelia micrantha (Euphorbiaceae) in the Kakamega Forest of Western Kenya

Mbahin, N.; Raina, S. K.; Kioko, E.N.; Mueke, J. M. (International Centre of Insect Physiology and Ecolopgy, 2007)

A study on the spatial distribution of the silkmoth Anaphe panda (Boisduval) cocoon nests, egg clusters and the host plant Bridelia micrantha (Hochst) Baill. was conducted in two different habitats of the Kakamega Forest ...
C-methylated and C-prenylated isoflavonoids from Root Extract of Desmodium Uncinatum

Guchu, Salome M.; Yenesew, Abiy; Tsanuo, Muniru K.; Gikonyo, Nicholas K.; Pickett, John A.; Hooper, Antony M.; Hassanali, Ahmed (Elsevier, 2007)

A pterocarpan, 1,9-dihydroxy-3-methoxy-2-methylpterocarpan (named uncinacarpan) and two isoflavanones, 5,7-dihydroxy-20,30,40- trimethoxy-6-(3-methylbut-2-enyl)isoflavanone (named uncinanone D) and 5,40-dihydroxy-7,20-di ...
Susceptibility of Immature Stages of the Locusts Schistocerca Gregaria and Locusta Migratoria Migratorioides to the Microsporidium Johenrea Locustae and Effects of Infection on Feeding and Fertility in the Laboratory

Maniania, Nguya K.; Vaughan, Larry J.; Ouna, Elizabeth (Taylor & Francis, 2008)

Second instar nymphs of African migratory locust, Locusta migratoria migratorioides, and desert locust, Schistocerca gregaria, were tested for their susceptibility to the microsporidium pathogen Johenrea locustae (Lange ...
Carbon Storage and Emissions offset Potential in an African Dry Forest, the Arabuko-Sokoke Forest, Kenya

Glenday, Julia (Springer Science + Business Media, 2008)

Concerns about rapid tropical deforestation, and its contribution to rising atmospheric concentrations of greenhouse gases, increase the importance of monitoring terrestrial carbon storage in changing landscapes. Emerging ...
Long-distance Pollen flow Assessment through Evaluation of Pollinator Foraging Range Suggests Transgene Escape Distances

Pasquet, Remy S.; Peltiel, Alexis; Hufford, Matthew B.; Oudin, Emeline; Saulnier, Jonathan; Paul, Lenaic; Knudsen, Jette T.; Herren, Hans R.; Gepts, Paul (PNAS, 2008)

Foraging range, an important component of bee ecology, is of considerable interest for insect-pollinated plants because it determines the potential for outcrossing among individuals. However, long-distance pollen flow is ...
Impacts of Land use, Anthropogenic Disturbance, and Harvesting on an African Medicinal Liana

McGeoch, Lauren; Gordon, Ian; Schmitt, Johanna (Elsevier, 2008)

African medicinal plant species are increasingly threatened by overexploitation and habitat loss, but little is known about the conservation status and ecology of many medicinal species. Mondia whitei (Apocynaceae, formerly ...
Influence of Visual and Olfactory Cues on Field Trapping of the Pollen Beetle, Astylus atromaculatus (Col.: Melyridae)

Berg, Van den; Torto, B.; Pickett, J. A.; Smart, L. E.; Wadhams, L. J.; Woodcock, C. M (Blackwell Verlag, Berlin, 2008)

Field trapping experiments investigated the response of the pollen beetle Astylus atromaculatus to visual and olfactory cues during a 3-year period, 1999–2001. The visual preference of the pollen beetle was determined using ...
Concentration-dependent Parsimonious Releaser Roles of Gregarious Male Pheromone of the Desert Locust, Schistocerca gregaria

Rono, Edwin; Njagi, Peter G.N.; Bashir, Magzoub O.; Hassanali, Ahmed (Elsevier, 2008)

The responses of (i) groups of crowd-reared mature males of desert locust, Schistocerca gregaria to a choice of two columns of air, one permeated with different concentrations of phenylacetonitrile (PAN), the major component ...
The natural history of Myrmarachne melanotarsa, a social ant-mimicking jumping spider

Robert, R. Jackson; Ximena, J. Nelson; Kathryn, Salm (Taylor & Francis, 2008)

Myrmarachne melanotarsa, an ant-like jumping spider (Salticidae) from East Africa, is an accurate mimic of Crematogaster sp. and associates unusually closely with its models. M. melanotarsa is remarkable in that it forms ...

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