Cereal scale

The genus Exaeretopus belongs to the Coccidae family within the order Hemiptera. These insects are recognized as specialized pests affecting various cereal crops. They are characterized by a sedentary lifestyle in the adult stage, often camouflaging themselves against the stems and leaves of host plants.

These pests primarily target crops such as wheat and barley. By inserting their stylets into plant tissues, they extract sap, which deprives the plant of essential nutrients. This feeding process weakens the plant host and creates entry points for secondary fungal infections or pathogens.

The biological cycle involves a transition from egg to crawler stages. Crawlers are mobile and disperse to suitable feeding sites on the plant. Once settled, they secrete a protective waxy or leathery covering that shields them from predators and many environmental stressors, facilitating their survival throughout the season.

Symptoms of infestation include chlorosis, leaf curling, and stunted growth of the main stem. In severe cases, the entire plant may show signs of yellowing and premature drying. The reduction in the photosynthetic area directly correlates with yield loss, affecting both grain size and overall harvest quality.

Effective management requires an integrated approach. Cultural practices, such as controlling wild grasses that act as hosts, are the first line of defense.

• Regular field scouting to detect early populations.
• Application of systemic insecticides when thresholds are exceeded.
• Promoting healthy plant growth through balanced fertilization.