Summary:
Cabbage root fly cause damage on brassica roots Cabbage root fly larvae feed on the roots of brassicas. Hereby, newly transplanted or recently emerged crops are most at risk as the root systems are less developed. The cabbage fly flight model determines the start of egg laying as 160 degree-days based on the soil temperature (10 cm) or based on the standard air temperature (2 m above the soil surface) at the same location.