Searching cabbage white eggs is easier, than to destroy the caterpillars, that develop from it.
The butterflies (Cabbage Whites) lay their eggs in clusters on the underside of the kohlrabi leaves. Their yellow color makes them easy to find. They are destroyed simply by crushing. one waits, until the larvae hatch, then in a short time there is considerable damage to the leaves. Although searching and destroying the caterpillars is much more complex, the use of chemical agents should only be limited, with strict observance of the grace period, take place.