Kenneth Glad
A familiar household suggestion has attracted attention as a possible answer to an unwelcome garden problem. Established guidance instead puts emphasis on routine maintenance and reducing easy access to food.
A common vegetable has been promoted as a possible way to discourage rodents, but local authority advice concentrates on more conventional measures around homes and gardens.
The Daily Express reports that Epic Gardening and Buzz Boss recommend onions because of their strong smell. Lorin Mielsen of Epic Gardening said rats “hate them”.
Householders are advised to leave an onion near a suspected access route and replace it before it begins to decay. Garlic planted around beds was also mentioned as another possible deterrent.
The outlets does not establish that onions provide reliable rodent control. Buzz Boss also associates onions with allicin, while research published in Frontiers in Plant Science discusses isoallicin as an important pungent sulphur compound in onions.
Food matters most
Test Valley Borough Council advises householders to clear spilled bird food before dusk, rather than leaving it available overnight when rodents may scavenge. It also recommends avoiding seed scattered directly on the ground and keeping animal feed in secure containers.
Where rodents are already appearing, its guidance suggests temporarily stopping bird feeding. Pendle Borough Council similarly recommends limiting the amount of bird food offered, cleaning up spills and using feeders designed to catch dropped seed.
Waste and compost need attention too. Pendle advises securing rubbish, keeping vegetation under control and blocking holes that could provide access to buildings. Food stored outdoors should be kept in containers that rodents cannot easily enter.
For compost, its advice includes avoiding meat and dairy products and burying suitable kitchen scraps. If rodents have already reached a compost heap, householders are advised to stop adding food.
That leaves onions as a reported household remedy, and it may be worth trying, but council advice focuses on cutting off the food and shelter that attract rats in the first place.
Sources: Daily Express, Epic Gardenin, Buzz Boss, Test Valley Borough Council, Pendle Borough Council, Frontiers in Plant Science
