(A) E-β -ocimene production by different larval instars during 20 minutes using an external standard method of quantification. (ng/larva) (circle: median; box: 25%–75%; whisker: Min-Max). (B) Level of ovary development in response to 10 larval equivalents per bee of E-β -ocimene (9 μg of E-β-ocimene/bee/24 hrs) (median ± Semi-InterQuartile Range). (number of sampled groups in brackets).