Cabbage seed weevil (turbatus)

Systematic position: Ceutorhynchus turbatus belongs to the order Coleoptera and the family Curculionidae (weevils). It is a specialized pest that specifically targets plants within the Brassicaceae family, making it a significant threat to specific agricultural sectors.

Host plants: The primary hosts include various cruciferous crops such as oilseed rape, mustard, radish, and various cabbage cultivars. The pest is highly adapted to these environments, allowing for rapid population growth in agricultural fields.

Biology and life cycle: Adult weevils overwinter in the soil or under plant debris. In the spring, they emerge and migrate to host plants. Females deposit eggs inside the plant tissues, typically in stems or inflorescences. The larvae then hatch and feed internally, completing their development within the plant structure.

Damage and harmfulness: The primary damage is caused by larvae feeding within the stems, which disrupts the vascular system and prevents efficient nutrient transport. This significantly weakens the plant, leads to stunted growth, distorted stems, and often causes substantial yield losses due to reduced seed filling and quality.

• Implementing crop rotation to prevent the buildup of pest populations.
• Managing cruciferous weeds in and around field borders to reduce host availability.
• Performing deep tillage after harvest to disturb overwintering sites.
• Applying targeted insecticidal treatments when threshold levels are reached.