Poppy stem weevil

Systematic position: The poppy stem weevil (scientific name Glocianus maculaalba) is a member of the order Coleoptera and the family Curculionidae. It is a highly specialized pest that exclusively targets plants within the Papaver genus.

Host crops: The primary host is the opium or oilseed poppy (Papaver somniferum). Both cultivated fields and wild-growing poppy populations can serve as breeding grounds, facilitating the spread of the insect to agricultural lands.

Biology and life cycle: The adults hibernate in the soil or under organic debris during the winter months. As temperatures rise in the spring, the beetles emerge and begin feeding on young leaves. Females subsequently lay eggs within the tissues of the poppy stems or flower stalks. Larvae develop inside the stem, feeding on internal tissues before moving back into the soil to pupate.

Type of damage: The damage is primarily caused by larvae burrowing within the stems, which disrupts nutrient flow and compromises the plant's structural integrity. This leads to stunted growth, stem curvature, premature wilting, and a significant reduction in the quantity and quality of seed yields.

Control measures: Management of the poppy stem weevil requires an integrated approach to reduce population levels.

• Implementation of crop rotation to break the pest's cycle.
• Deep autumn plowing to destroy overwintering sites in the soil.
• Strict removal of volunteer and wild poppy plants near fields.
• Application of authorized insecticides targeting adults before egg-laying commences.