Aphidius funebris; FORAGING-; Within patch behaviour of ovipositing females, influences; EGG-LAYING; Within patch foraging behaviour; BEHAVIOURAL-VARIATION; Individual differences in within patch foraging behaviour; ACTIVITY-PATTERNS; Within patch foraging time budgets, influencing factors; HEMIPTERAN-HOSTS; Uroleucon jaceae; Within patch foraging behaviour of ovipositing females; Host behaviour, plant architecture & individual variation relationships; SPATIAL-ENVIRONMENT; Plant architecture effects on within patch foraging for hemipteran hosts Uroleucon jaceae; HYMENOPTERAN-PARASITES; Aphidius funebris; Parasite within patch foraging behaviour, influencing factors; PLANT-HOSTS; Centaurea jacea (brown knapweed); Hymenopteran parasite foraging behaviour, plant structure & host influences; POPULATION-SIZE; Colonies on plant hosts, hymenopteran parasite foraging responses