Anomala undulata

Systematic position. Anomala undulata belongs to the order Coleoptera and the family Scarabaeidae. This species is a member of a large genus of leaf-feeding beetles known for causing economic damage to agriculture in tropical and temperate zones.

Host plants. This pest exhibits a wide range of host plants, acting as a generalist feeder. It is particularly known to infest crops such as corn, soybeans, and grapevines. In addition to agricultural crops, it often targets ornamental plants and fruit trees, leading to significant foliage loss.

Biology and lifecycle. The lifecycle of this insect involves complete metamorphosis. Females deposit eggs in soil rich in organic matter. After hatching, the larvae, often referred to as white grubs, develop underground, feeding on plant roots and decaying matter before pupating within the soil profile.

Damage and economic impact. Adult beetles feed on leaves, often skeletonizing them, which drastically reduces the plant's ability to photosynthesize. The subterranean larvae cause more severe, often overlooked damage by severing roots, leading to stunted growth, wilting, and reduced nutrient uptake in young plants.

Control measures. Integrated Pest Management (IPM) is essential for effective control of this scarab beetle.

• Implementing crop rotation to disrupt the soil-dwelling larval cycle.
• Tilling the soil to expose larvae and pupae to predators and heat.
• Monitoring adult populations with light or pheromone traps during the flight season.
• Application of targeted insecticides or biological control agents when pest density exceeds economic thresholds.