Ethology of Dasyneura brassicae Winn. (Dipt., Cecidomyidae). I. Laboratory studies of olfactory reactions to the host-plant.
An olfactory stimulus is thought to be involved in the migration of Dasineura brassicae (Winn.). Studies in Sweden demonstrated the occurrence of an olfactory response to rape plants by mated females of the cecidomyid. Males did not exhibit the same behaviour. The odour seemed to be perceived mainly by antennal receptors. The data indicated that sinigrin, which occurred in the undamaged plant, plays a part in long-distance orientation, facilitating the finding of a suitable food-plant rather than finding suitable oviposition sites on the plant.