Fig. 2.: a. 48-well microtiter plate containing 47 plastic queen cups on dental rolls. Larvae are about 6-7 days old and reared in the same cup from first instar on (Photo: Pierrick Aupinel). b. 3 groups of 10 each first instars (upper panel) which will be progressively isolated in new wells lined with filter paper, in the end resembling the 3 engorged larvae in one cup each (lower panel, Photo: Elke Genersch).