Pollen beetle

The pollen beetle, scientifically known as Brassicogethes aeneus, belongs to the family Nitidulidae and is a major pest of cruciferous crops. These small, metallic-green beetles are highly capable of causing economic damage to commercial oilseed production worldwide.

The pest primarily targets oilseed rape, mustard, turnip, and various cabbage family crops. The most critical period of infestation occurs when the host plants are in the green bud stage, as the adult beetles rely on pollen as their primary nutrient source to mature their eggs.

Regarding its biology, the insect overwinters as an adult in soil or leaf litter. In the spring, they emerge and migrate to host plants. Eggs are laid inside the flower buds, and after hatching, the larvae feed on the internal floral parts, which effectively destroys the potential seed-bearing organ.

Damage symptoms are characterized by blasted buds, which often dry out and fall off, leaving behind empty stalks. This feeding behavior forces the plant to divert energy to vegetative growth rather than seed pod development, leading to significant yield losses in untreated fields.

• Crop rotation to break the pest's lifecycle.
• Monitoring pest populations using yellow sticky traps.
• Selecting early-flowering varieties to escape peak infestation.
• Applying insecticides only when economic thresholds are reached.

Integrated pest management is essential for long-term control. Farmers should prioritize biological monitoring and ensure that any chemical intervention is timed precisely before the flowering stage to protect beneficial pollinators such as honeybees, while maintaining the productivity of the crop.