Community Structure and Dynamics in Desert Ecosystems: Potential Implications for Insecticide Risk Assessment H. C. H. G. van der Valk Pages: 11 - 21
The Calibration of an Artificial Stream System Used to Investigate the Tolerances of South African Riverine Invertebrates to Selected Water Quality Variables C. G. PalmerP.-A. Goetsch Pages: 22 - 31
Salinity Tolerances of Selected Macroinvertebrates of the Sabie River, Kruger National Park, South Africa P.-A. GoetschC. G. Palmer Pages: 32 - 41
Risk Assessment as a Management Tool Used to Assess the Effect of Pesticide Use in an Irrigation System, Situated in a Semi-Desert Region A. M. RaschkeA. E. C. Burger Pages: 42 - 49
Ecotoxicology of Organisms Adapted to Life in Temporary Freshwater Ponds in Arid and Semi-Arid Regions J. Lahr Pages: 50 - 57
Impacts on Nontarget Insects of a New Insecticide Compound used Against the Desert Locust [Schistocerca gregaria (Forskål 1775)] G. BalançaM.-N. de Visscher Pages: 58 - 62
The Impact of Insecticides on Beneficial Arthropods in Cotton Agro-Ecosystems in South Africa H. van HamburgP. J. Guest Pages: 63 - 68
Virulence of the Entomopathogenic Fungus Metarhizium flavoviride Gams and Rozsypal and Toxicity of Diflubenzuron, Fenitrothion-Esfenvalerate and Profenofos-Cypermethrin to Nontarget Arthropods in Mauritania R. PevelingS. A. Demba Pages: 69 - 79
Environmental Effects of Heavy Spillage from a Destroyed Pesticide Store near Hargeisa (Somaliland) Assessed During the Dry Season, Using Reptiles and Amphibians as Bioindicators M. R. K. Lambert Pages: 80 - 93
Optimization of Environmental Factors for the Biological Treatment of Trinitrotoluene-Contaminated Soil R. BoopathyJ. ManningC. F. Kulpa Pages: 94 - 98
Persistence of Polycyclic Aromatic Hydrocarbon Components of Creosote Under Anaerobic Enrichment Conditions B. R. Sharak GenthnerG. T. TownsendJ. G. Mueller Pages: 99 - 105
Effect of Subsurface Drains on Runoff Losses of Metolachlor and Trifluralin from Mississippi River Alluvial Soil L. M. SouthwickG. H. WillisR. L. Bengtson Pages: 106 - 109
Tolerance of the Nematode Caenorhabditis elegans to pH, Salinity, and Hardness in Aquatic Media N. KhannaC. P. Cressman IIIP. L. Williams Pages: 110 - 114
