Da Inglese a Italiano Altro Botanica

The onion smell that allium crops exude can also be useful to disguise the smell of other crops in a form of pest control: for example, growing alliums around carrots can deter carrot fly as the alliums mask the smell of the carrots when the leaves are damaged by thinning.

pensavo di tradurre come segue: ...funge da deterrente per la mosca della carota, coprendone l’odore quando le foglie...?