THE ROLE OF SCENTS IN POLLINATION BY THE HONEYBEE (APIS MELL. L.)

Using pesticides – non toxic to bees – in orchards during full bloom forces pollinating honeybees to leave, due to repelling odours.
The repelling odour of Captan e.g. can be masked effectively by a herbal "bitter". Tests using compounds from the herbal fraction of the highly active bitters have resulted in better cropping.

Fruit Set and Development, XXI IHC

J.P. van Praagh, W. von der Ohe

https://doi.org/10.17660/ActaHortic.1983.139.8