Sweet potato bug

Systematic position. The sweet potato bug (Corecoris batatas) belongs to the order Hemiptera, family Coreidae. This insect species is a specialized phytophagous pest that primarily associates with plants of the Convolvulaceae family, specifically sweet potatoes.

Crops and pest impact. The primary host plant is the sweet potato (Ipomoea batatas). The pest feeds by piercing and sucking plant juices from stems and leaves. High infestations often result in wilting of young shoots, leaf deformation, and a significant decrease in tuber yield and quality, causing economic losses in agricultural regions.

Biology and life cycle. The life cycle consists of egg, five nymphal instars, and the adult stage. Adult bugs are characterized by a typical coreid body shape and brown coloration, which provides effective camouflage in the host environment. Development is highly sensitive to ambient temperature, with peak reproductive activity typically occurring during warm summer conditions.

Nature of damage. Feeding sites often show chlorotic spots that eventually develop into necrotic lesions. Severe infestations lead to stunted plant growth, premature defoliation, and reduced vigor of the host plant. The pests tend to aggregate on the underside of leaves, which makes early detection and manual control challenging.

Control measures. Effective management requires an integrated approach.

• Implement proper crop rotation to break the pest's life cycle.
• Eliminate weeds belonging to the Convolvulaceae family that act as reservoirs.
• Apply contact-stomach insecticides based on the economic injury level.
• Regular field scouting to identify and treat hotspots before the pest population expands.