Bracon hebetor; REPRODUCTIVE-BEHAVIOUR; EGG-LAYING; On parasitized lepidopteran hosts, analysis of factors causing ovicide; FECUNDITY-; Tendency to kill eggs previously laid on lepidopteran host relationship; POPULATION-GENETICS; Variation in tendency to kill eggs previously laid on lepidopteran host; BEHAVIOURAL-VARIATION; Tendency to kill eggs previously laid on lepidopteran host; AGGRESSIVE-BEHAVIOUR; Ovicide, environmental & genetic determinants, lepidopteran host; LEPIDOPTERAN-HOSTS; Plodia interpunctella; Killing of eggs previously laid on host, influencing factors none