Carrot fly
Protect your carrots, parsnips and celery crops from damage by carrot fly larvae.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Time to act | yes | yes | yes |
Creamy-yellow larvae hatch from the white eggs of the carrot fly, Psila rosae, and tunnel into the roots of carrots and other related plants, such as parsnips and celery. The damage creates brown scarring on the exterior of the taproots. Damaged roots are then susceptible to secondary rots. Sometimes the foliage turns yellow and plants might even die.
Symptoms
Tunnelling maggots feast on the carrot flesh, causing the outsides to be marked with brown rings. This is often followed by rotting.
Find it on
carrots, celery, parsley, parsnips
Organic
Sow carrots after late-spring to avoid the first generation of carrot fly larvae. Harvest the roots by late-August, before the second generation of larvae emerges.
Carrot fly can detect the scent of carrots from a mile away; sow the seed thinly, as the process of thinning the seedlings releases the carrot's scent. Plant strong-smelling crops, such as garlic, onions, shallots and leeks adjacent to the carrots.
Follow a strict crop rotation plan, avoiding growing carrots on the same site in consecutive years, and place horticultural fleece over the seedlings, which will provide a physical barrier against the pest.
Some carrot varieties – 'Resistafly', 'Sytan' and 'Fly Away' – are less prone to attack.
Festive subscription offer
Save 51% on the shop price. Subscribe to BBC Gardeners' World Magazine today and get 6 months of free seeds for Spring 2025.
Year Planner 2025 on sale
Starting to plan your gardening year? The Year Planner 2025 is packed with expert advice from the Gardeners’ World team, to ensure you have your best gardening year yet.
Discover our new digital travel brochure
Whether it's a thrilling Arctic cruise or a charming getaway to historic Bath, our NEW travel brochure has exciting options for everyone.
New podcast series
Join Monty and the team for advice on winter gardening, tulips, caring for birds, house plants and more in the new BBC Gardeners' World Magazine podcast series.