My beds are about 8inches tall. The carrot root fly is the main pest that attacks carrots—and one that gardeners need to be ready to go to battle with when harvesting carrots and other members of the umbelliferae (or apiaceae) family, which includes carrots as well as celery, dill, fennel, parsley, parsnip, and celeriac. The biggest problem with growing carrots is not the actual growing but the pests that attack them. I read that carrot fly are very low flying and find it difficult to "attack" carrots if there is some sort of raised protective barrier. Previous generations give life to new individuals, active reproduction ensures good survival of the species. The carrot fly (Chamaepsila rosae) is a pest of gardens and farms, and mainly affects the crop of carrots, but can also attack parsnips, parsley and celery.It is a member of the family Psilidae (order Diptera). Another way to defend your carrots from attack is through nematodes. Carrot root fly is the worst of these pests. If you do have terrible trouble with carrot fly, consider sticking to just spring sowing for a summer harvest. If you have had Carrot Fly (Psila Rosae) in the past, you’ll know that this little pest can completely ruin a whole crop.Carrots are not the only crop to be affected. There may be tunnelling or destruction of the extremity of the tap root only, or, if the root has thickened, tunnels similar to those caused by the second generation may occur. It is also a good idea to plant when the fly is not active and avoid planting in April to … A useful article HERE about carrot fly prevention, although no mention of nematodes. Generally, Carrot Fly will appear in 3 big … The main host plant is carrots but they also attack celery, celeriac, parsnips and parsley. An adult carrot fly is a very small black fly which has been described as "a low flying miniature cruise missile". The fly is attracted to the Carrots by smell. Parsnips also suffer, as do other members of the same family such as parsley and celery.. 1. About Carrot fly Adult carrot flies are part of a … Harm. Carrot fly is a dangerous pest. Make sure any carrots infected with larvae are removed and disposed of. The nature of first-generation carrot rust fly injury depends upon the development of the plant at the time of the attack. And be sure to rotate crops so that you grow your carrots in a different part of the plot each year. When does Carrot fly appear? Rust fly maggots cause particular harm to the roots. WHAT IS A CARROT FLY? They tunnel and live in the root and high … Would raised beds reduce carrot fly or would i also need to put a higher mesh around my raised beds? Hi Allan, avoid growing carrots in the same place each year and rotate with another crop that is not a root crop. Bury carrots below the soil so that the fly cannot lay its eggs. 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