none Pieris rapae; HYMENOPTERAN-PARASITES; Cotesia rubecula; Parasite flight track towards host infested plant, influencing factors Cotesia rubecula; CHEMORECEPTION-; EXPERIENCE-; Relationship; ORIENTATION-; Flight track towards lepidopteran host infested plant, influencing factors; LEPIDOPTERAN-HOSTS; Pieris rapae; Host infested plant location, flight manoeuvres Cotesia rubecula Marshall (Hymenoptera: Braconidae) is a specialist larval parasitoid of the butterfly Pieris rapae L. which itself feeds almost exclusively upon cruciferous plants, Female wasps are attracted to the odour of host-infested plant (plant-host complex: PHC) and the probability of flights in a wind tunnel depends on females' prior oviposition experience with the PHC and on the concentration of the PHC odour. This study considers the effect of both factors on characteristics of oriented flight upwind towards the PHC. The flight track parameters that we measured and calculated were not significantly affected by these factors. C. rubecula females exhibited high average flight velocity and relatively straight flight tracks. There was a considerable variability between individuals, however, in their odour-modulated upwind flight tracks. Some females generated a zigzagging upwind flight track similar to those commonly observed from male moths responding to female sex pheromone. Other females flew along a straight track directly upwind. The flight tracks of most female wasps were intermediate between these extremes. The full range of these flight performances was observed to all experimental treatments.