ContentsPrefaceWhy Get Resistance? It Can Be Prevented Or DelatedDistribution And Seriousness of Herbicide-Resistant Weed Infestations WorldwideThe Development of Herbicide-Resistant Populations of Alopecurus Myosuroides (Black-Grass) In EnglandResistance to Herbicides in Annual Ryegrass (Louum Rigidum) In AustraliaThe Occurrence of Trifluralin Resistant Setaria Viridis (Green Foxtail) in Western CanadaParaquat Resistance in JapanChloroplastic Resistance of Weeds to Triazines in EuropeMutation For Triazine Resistance Within Susceptible Populations of Chenopodium Album L.Sulfontlurea Herbicide-Resistant Weeds: Discovery, Distribution, Biology, Mechanism And ManagementManaging Herbicide Resistance Through Fitness and Gene FlowThe Molecular Basis of Resistance of Photosystem II InhibitorsMechanisms of Paraquat ToleranceDinitroaniline Resistance in Eleusine Indica May Be Due to Hyperstabilised MicrotubulesMechanisms of Resistance to Acetolactate Synthase/Acetohydroxyacid Synthase InhibitorsDifferential Inhibition of Plant Acetyl Coa Carboxylase-The Biochemical Basis For The Selectivity of the Aryloxyphenoxypropanoate and Cyclohexanedione HerbicidesCytochrome P450 and Herbicide Resistance Glutathione and Glucoside Formation in Herbicide SelectivityThe Role of Compartmentation of Herbicides and Their Metabolites In Resistance MechanismsSynergists to Combat Herbicide Resistance Enhancement of Crop Tolerance To Herbicides With Chemical SafenersThe Genetical Analysis And Exploitation of Differential Responses to Herbicides In Crop Species Herbicide Tolerance in The Graminaceae - A Plant Breeder's ViewIn Vitro Techniques For The Selection of Herbicide Resistance Molecular Analysis of Sulfonylurea Herbicide-Resistant ALS GenesEngineering of Glufosinate Resistance And Evaluation Under Field ConditionsOpportunities For Introducing Herbicide-Resistant Crops Assessment of The Hazards From Genetically Engineered Plants: The Work of The Advisory Committee On Genetic Manipulation Intentional Introduction Sub-CommitteeHerbicide Resistance in Weeds And Crops, Progress and ProspectsAbstracts of PostersSynergised Mtcohkrbicides - Potential Agents For Controlling Herbicide-Resistant WeedsHerbicide-Resistant Weeds and Alternative Control Measures in YugoslaviaRelationship Between Light Intensity and Growth Parameters in Triazine-Resistant Amaranthus Hybridus and A. BlitoidesIn Vitro Selection of Herbicide-Tolerant Variants of WheatInitial Effects of the Herbicide Mecoprop On Photosynthesis and Transpiration By A Mecoprop-Resistant Biotype of Stellaria MediaTriazole, Triazine, Triazinone and Phenylurea Resistance in Annual Ryegrass (Lolium Rigidum)Control of Herbicide Resistant Black-Grass with Herbicide Mixtures Containing TridiphaneStudy of the Growth of Herbicide-Resistant Black-Grass PopulationsCross-Resistance of Poa Annua Biotypes to Paraquat and TriazinesIs Mecoprop-Resistance in Chickweed Due to Altered Auxin Sensitivity?Escape of Herbicide Resistance Gene From Transgenic CropsLuminescence and Fluorescence Study of Photosystem II Electron Transfer In Triazine Resistant Mutants of Weed Plants. Comparison With Herbicide Resistant Mutants From CtanobacteriaComparative Metabolism of Cinnamic Acid and Bentazon By Soybean, Rice And Velvetleaf (Abuulon Theophrasti) Cultured CellsIntra-Specific Variation of Gauum Aparine To Fluoxypyr From A Range of Sites In EuropeOn The Mechanisms of Resistance to Aryloxyphenoxypropionate, Cyclohexanedione and Sulfonylurea Herbicides in Annual Ryegrass (Lolium Rigidum)Non-Plastid Resistance to Diuron in Triazine-Resistant Weed BiotypesThe Occurrence of Herbicide-Resistant Weeds in Treated Strips In OrchardsEffect of Heat and Herbicide Stress in Cultured Soybean CellsInheritance of Sulfonylurea Herbicide Resistance in Prickly Lettuce (Lactuca Serriola) and Domestic Lettuce (Lactuca Sativa)Use of Chlorophyll Fluorescence to Study the Distribution of Photosystem II Inhibiting Herbicides in LeavesDifferential Responses of Wheats and Rye to A Sulfonylurea HerbicideOccurrence of Cytochrome P450 Mono-Oxygenases in The Metabolism Of Chlorotoluron By Wheat MicrosomesArthrobacter Sp. Ni 86/21 Against Phytotoxicity of Thiocarbamate HerbicidesSafeners From CornInvestigation of Simazine, Linuron and Trifluralin Resistant and Susceptible Weed Species In BulgariaEffects of the Herbicide Safener Naphthalic Anhydride On the Growth of A Zea Mays L. Cell Suspension Culture: Interaction with the Herbicide Metsulfuron-Methyl and 2,4-DDiquat Resistance in Paraquat/Atrazine Coresistant Conyza CanadensisHerbicide Resistance In Weeds In New ZealandComparison of Triazine-Resistant and -Susceptible Biotypes of Solanum NigrumCharacterisation of Triazine-Resistant Populations of Amaranthus CruentusGlyphosate and Microspore Viability in Bras5ica NapusIsolation of Atrazine-Resistant Cell Lines and Regeneration of Plantlets in Cicer Arietinum (L)Nodulation and Yield of Beans (Phaseolus Vulgaris L.) Show Differential Tolerance to Pre-Energence HerbicidesComparison of the Photosynthetic Capacity and Chlorophyll Fluorescence For Triazine-Resistant And -Susceptible Chenopod1um Album L.The Genetical Analysis and Exploitation of Differential Responses To Herbicides In Crop SpeciesThe Influence of Nitrogen Forms On the Growth, Photosynthesis and Chloroplast Activity of Triazine-Resistant and -Susceptible Plants of Erigeron Canadensis L.Investigation of the Selectivity Mechanism of Plants to the Herbicide, ClomazonePopulation Shifts Following Chemical Herbicide Applications to Wheat FieldsCharacterization of Cyclohexanedione and Aryloxyphenoxy-Proprionate-Tolerant Maize Mutants Selected From Tissue CultureXenobiotic Metabolism in Higher Plants: Aryl Hydroxylation of Diclofop Bt a Cytochrome P450 Enzyme From Wheat MicrosomesParticipants In The Symposium Subject Index