Carrot fly
Psila rosae
This description was machine-translated.
How to spot it
The carrot fly lays its eggs at the root collar of umbellifers, and the maggots eat rust brown tunnels just under the skin of the root. Affected carrots and parsnips turn bitter and woody and rot quickly in store. A first sign is reddish discoloured foliage. The fly is on the wing in two to three generations from May into autumn.
Prevention
Stretch a fine mesh crop protection net (mesh size ≤ 0.8 mm) over the bed directly after sowing. The fly finds the plants by their scent and has to stay outside. Thin the rows only in the evening when there is no wind and press the soil down well afterwards, so that no scent escapes. A mixed planting with onions or leeks masks the carrot smell, and a crop rotation with a break of several years keeps the population low.
Affected plants
These plants in our database are especially susceptible.
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