- Many plants from the Brassica family are attacked, as well as a small number of ornamentals.
- Adult beetles are up to 3mm long, usually shiny black in colour and may have light coloured stripes down their wing casing.
- Larvae are small white coloured grubs with brown heads and pairs of fleshy legs.
- Eggs are tiny opaque yellow elliptical forms, and are laid around plant roots.
- Adults usually have long, hinged hind legs that enable them to jump like fleas.
- Over-wintering takes place as adults, either beneath the soil surface or amongst plant debris around the base of the plant.
- Adults re-emerge in early spring to feed and mate.
- During dry periods in April/May, feeding can be severe and may result in plants dying. During this time adults can be seen jumping on and around infested plants.
- Eggs are laid towards the end of May/ early June, and will hatch a few days later.
- The larvae will begin to feed immediately after hatching. Mainly on plant roots, although some larvae feed on leaves.
- Pupation occurs in late summer, with second generation adults emerging during autumn.
Note: It is important to read manufacturer's instructions for use and the associated safety data information before applying chemical treatments.
- Fleeces can be used to protect new seedlings from infestation.
- Encourage insectivorous birds by hanging boxes and feeders.
- Use yellow sticky traps to catch adults.
- Flea beetles prefer dry conditions, so keep plants well watered.
- Remove all plant debris from the base of your plants, to reduce over-wintering sites.
- Try “trap planting” by growing more susceptible hosts between your primary plants.