Yep - I have a frame that fits over the raised bed which I cover in fleece each year - looks a bit like a table with a white cloth on it from the distance. The adults don’t do any damage, but after the eggs hatch, larvae immediately burrow into the soil and start feeding on the roots. Carrot fly. Some growers use varieties that will over-winter and mature before the root fly is active. In spring the flies crawl from the soil and become active. By monitoring the population can be monitored and actions can be taken when necessary. Strategic sowing times. The presence of the carrot fly is a big threat for the growth of carrots. Poly-Tunnels - a sure fire way to keep carrot fly at bay. Completely encircling your carrot crop with allium family plants such as onions, leeks or chives is believed to literally throw carrot fly off the scent. The carrot fly, a tiny black insect with a yellow head, lays its eggs near carrots (and other members of the carrot family), and they hatch into tiny white maggots that tunnel into the roots and feed. Carrot rust fly, carrot root fly, or Psila rosae is a significant pest to carrots. Although you may think that this fly gets its name because it spreads rust – a common fungal disease seen in plants – you’d be incorrect! Threshold. They can result in aesthetic damage and in severe instances, will lead to profit loss amongst commercial growers. We've still got some glitches with the new platform to work through and a lot of blog posts to move over from the old site, but hopefully all of our past posts will be available soon. Keeping carrot fly and other nasties at bay. Timing the planting of carrots to miss the three active periods of the carrot fly larvae may also help. The fly is small, around 0.15 inches (4 mm) long with a dark body, a yellow head, and see-through yellow wings. Use a fly resistant variety. I've never had (or at least the carrots haven't had) carrot fly since using this method. Carrot root fly larvae can also invade the roots of parsnips, parsley, celery and other herbaceous plants. These eggs develop into little larvae that sooner or later burrow into the carrots. There is also a variety called 'Flyaway' from Thompson & Morgan. Thanks for all of the support from customers and readers that have made it possible for Tactical Fly Fisher to become a full time pursuit. The carrot fly poses a serious threat to carrots and can damage up to 90% of the roots. It's put on as soon as the carrots go in and comes off only for weeding and harvesting. and other related crops within the same family. Marshalls sell a variety called Sytan that is less likely to be attacked by carrot fly than other varieties. There are now suppliers of small (for domestic/school garden use) to large commercial tunnels. Carrot rust flies (Psila rosae) are well known to growers of carrots, parsnips, celeriac, celery and other umbelliferous crops.The adult females are attracted to the odor of the host plant, and lay their eggs at the crown of the plant. Due to the fact that the fly can only fly about two feet (61 cm) from the ground, covering the plants with a protective mesh or two-foot high barrier around them, or planting them in pots which are kept high on a table, may be effective. As with most companion planting advice there is conflicting evidence on its effectiveness, so it’s worth experimenting in your own garden. It's that time of year again when seeds are sown and seedlings are transplanted out into the veggie garden. The carrot fly still is one of the most common pests in the growth of carrots. Carrot fly tends to lay its eggs in the late afternoon or after rain so beware of these critical times. 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