Apple fruit weevil

The apple fruit weevil (Lasiorhynchites sericeus) is a small beetle belonging to the order Coleoptera and the family Attelabidae. It is a well-known pest in temperate fruit orchards, causing direct damage to vegetative and reproductive parts of various trees, which can significantly affect fruit production quality.

This pest primarily attacks pome and stone fruit trees, including apple, pear, plum, cherry, and apricot. Adult beetles cause harm by feeding on swelling buds, young leaves, flower clusters, and developing fruitlets. The activity of the weevil is most critical during the early spring growth stage when the trees are most vulnerable.

The life cycle involves complete metamorphosis. Adults overwinter in the soil or under debris. In spring, they emerge to feed and mate. Females lay eggs inside young fruit or leaf stalks, then partially sever the stem, causing the fruit or leaf to fall to the ground. Larvae continue their development inside the fallen fruit before pupating in the soil.

Symptoms of infestation include numerous small punctures on buds and leaves, premature fruit drop, and withered or rolled leaves. The economic impact is substantial as the weevil can reduce the overall yield and damage the tree's health. Heavy infestations often lead to deformed fruit that is unsuitable for market.

Control strategies should focus on a combination of cultural and chemical practices. Growers are advised to remove fallen fruit regularly to disrupt the larval development cycle and to cultivate the soil beneath trees to expose pupae to predators. Targeted insecticide treatments applied during the green bud stage or post-bloom period are effective in reducing the adult population.

• Regular collection and destruction of fallen fruit.
• Soil cultivation around the base of the trees.
• Proper timing of insecticide applications.
• Monitoring pest density during the spring migration.