Corn rootworm
The pupa is hard to find in the soil, as this stage lasts only a few days. The adults, 5-6 mm long, are dark yellow in colour and there are three black [...] General The western corn rootworm ( Diabrotica virgifera virgifera ) is a chrysomelid beetle originating from North America, where it is regarded as the [...] larvae feed on the rootlets and dig tunnels in the larger roots. This leads to a reduction of the root system, making the plant more susceptible to lodging