The beetles are 6 mm long and yellow, with a dark red (purple) band across the shoulders and two purple spots on the ends of the wing covers. The flaccid yellowish eggs are small (less than 1 mm across) and oval. The larvae are white, slightly flattened with hard brown (sclerotised) plates at both ends, and reach 10 mm in length.
Similar: The adults are easily distinguished from other beetles by their distinctive colouration.
Distribution: Throughout northern Australia and particularly in cane-growing coastal regions such as Bundaberg.
Crops attacked: Adults feed on many types of plants. Of the summer legumes, soybeans, navy beans and mungbeans are particularly attractive hosts. Other crops include cotton, sugarcane and pasture grasses. Larvae feed underground on the roots of sugarcane and pasture grasses.
Damage: Adult beetles attack leaves and flowers. High populations (e.g. 50 per square metre) will shred leaves and denude crops of flowers.
- Chlorban 500 ECEfficiency: ★★★
- Cyren 300 ULV/ECEfficiency: ★★★
- Cyren 500 ECEfficiency: ★★★
- Electra 225Efficiency: ★★★
- FMC Chlorpyrifos 500Efficiency: ★★★
- Lancer 750 DFEfficiency: ★★★
- Lancer 970Efficiency: ★★★
- MarlinEfficiency: ★★★
- Steward ECEfficiency: ★★★
- Barmac DiazinonEfficiency: not_available
- Chlorpos 500 ECEfficiency: not_available
- Conquest Chlorpyrifos 500Efficiency: not_available
- Endosulfan 350Efficiency: not_available
- Landrin 225Efficiency: not_available
- Lannate-LEfficiency: not_available
- Lepidex 500Efficiency: not_available
- Lorsban 500 ECEfficiency: not_available
- Nudrin 225Efficiency: not_available
- Orthene XtraEfficiency: not_available
- Strike-Out 500 ECEfficiency: not_available
- Submarine 970 SGEfficiency: not_available
- Suprathion 400 ECEfficiency: not_available