Techniques; Sampling techniques; Sampling alatae; Sampling populations on plants; Population development models; Descriptive models; Analytical explanatory models; Numericak simulation models; Summary models and their use in technology; Mounting techniques; Note-book for recording data of aphid samples; Clearing procdures for munting aphids on slides; Mounting of the aphids om microscopic slides; Aphid collections; Photographs and collections of films and pictures; Microscopy; Light microscopy; Dissections; Histological techniques, drawings; Transmission electron microscopy; Scanning electron microscopy; Rearing and handling aphids; Virus transmission studies; Use of isotones; Electrical recording of stylet penetration activities; Aphid energy budgets; Aphid bioassay techniques; Electrophysiological techniques; Electrophoretic techniques for the genetic study of aphids; Applications of artificial feeding techniques for aphids; Natural enemies; Parasites; Aphidiidae; Aphelinidae; Hyperparasities; Sampling and rearing of aphid parasites; Predators; Coccinellidae; Neuroptera; Syrphidae; Cecidomyiidae; Anthocoridae; Carabidae and other invertebrates; Sampling, rearing and handling of aphids predators; Aphid pathogens; Resistance of aphid natural enemies to insecticides; Resistance in aphidophagous insects; Selective toxicity favouring predators and parasitoids
