Damage symptoms
The larvae are root feeders, but also feed on aboveground parts of the plant. They create most damage on young plants, especially caulifowers and summer cabbages. They feed by creating tunnels in the root neck and main root, leading to growth retardation, reduced yield, and even plant death. Larvae also feed on the aboveground part of the plant, creating tunnels in the veins of the leaves. Infested plants often exhibit yellowing, and leaves are drooping. As the infestation progresses, affected plants may become more susceptible to diseases and environmental stressors, further compromising their overall health.