Green leaf beetle

Systematic position: Chrysolina viridana belongs to the order Coleoptera and the family Chrysomelidae. As a member of the leaf beetle family, it undergoes a complete metamorphosis, moving through larval, pupal, and adult life stages.

Host plants: This pest primarily targets plants within the Lamiaceae family. It is most frequently observed feeding on various species of sage, mint, and thyme. Under certain environmental conditions, it can also affect related ornamental species in urban gardens.

Biology and lifecycle: The lifecycle follows four distinct stages: egg, larva, pupa, and adult. Adults overwinter in the soil or under plant debris. In the spring, they emerge to feed and deposit their eggs on the undersides of leaves. Larvae develop through several instars before pupating in the ground.

Nature of damage and harmfulness: Both adults and larvae are responsible for leaf tissue consumption. They create irregular holes and notches in the leaves, often stripping them down to the vascular system. Excessive feeding causes significant stress to the plant, leading to stunted growth or total defoliation.

Control measures: Integrated pest management is recommended to control Chrysolina viridana. Cultural practices, such as removing Lamiaceae weeds, are essential. If necessary, chemical control involves the application of appropriate insecticides during the active feeding phase, combined with manual removal of the beetles in the early morning.