Gold-colored leaf weevil

Systematic position: The Gold-colored leaf weevil (Pselaphorhynchites auratus) belongs to the order Coleoptera and the family Rhynchitidae. It is a specialized pest of fruit trees that causes significant damage in temperate orchards, often becoming a major concern for commercial fruit producers.

Host plants: The pest primarily targets fruit trees belonging to the Rosaceae family. Its preferred hosts include apples, pears, plums, apricots, cherries, and sweet cherries. A high infestation rate can lead to the destruction of a significant portion of fruit set, drastically reducing total yields.

Biology and life cycle: Adult beetles overwinter in the soil at depths of up to 15 cm. In the spring, when temperatures reach 10–12°C, they emerge to feed on buds and young leaves. Females lay eggs in fruit or leaf stalks. The larvae develop inside the fruit, which eventually drops to the ground, allowing the larvae to enter the soil for pupation.

Damage and harmfulness: In early spring, beetles feed on buds, creating deep holes that prevent flowering. During summer, they damage the fruit itself, leaving dark spots and causing premature fruit drop. Damaged fruit becomes deformed and loses its commercial value, making it unsuitable for storage or fresh market sale.

Control measures: Managing this pest requires an integrated approach to minimize population levels:

• Sanitation, including the collection and destruction of fallen fruit (mummies) to interrupt the life cycle.
• Cultivation of soil under tree canopies to destroy overwintering pupae.
• Application of targeted insecticides during the bud-burst stage and post-bloom.
• Installation of sticky or mechanical trunk bands to capture beetles as they crawl up the trees.