THE KAIROMONE FROM BROWN PLANTHOPPER AND ITS RELATION TO RICE VARIETIES Contact response of Trichogramma confusum to 13 saturated hydrocarbons from host egg shells and abdominal scales of Plutella xylostella Electroantennogram and behavioural responses of two varieties of Leis axyridis from three types of habitats to aphid-damaged tea shoot volatiles and aphid kairomones Ecological effects of predator chemical cues in aquatic ecosystem Behavior response of four Leis axyridis varieties to volatiles from tea and Toxoptera aurantii Rhythm of honeydew excretion by the tea aphid and its attraction to various natural enemies