Fruit tree rhynchites

The fruit tree rhynchites (Cyllorhynchites betuleti) is a significant pest belonging to the family Attelabidae, order Coleoptera. This beetle is a common inhabitant of temperate orchards, where it poses a recurring threat to the production of high-quality fruit crops due to its feeding habits.

This species primarily targets various fruit-bearing trees, such as apple, pear, plum, cherry, and quince. While it prefers managed orchard environments, it is also capable of feeding on wild Rosaceae species, which often serve as reservoirs for the pest population in surrounding areas.

The biological cycle involves both soil-dwelling stages and stages where the insect resides within the plant tissue. Overwintered adults emerge in early spring, coinciding with bud burst. After mating, females deposit eggs into buds or young shoots. Upon hatching, larvae feed internally, which effectively destroys the growing points of the host plant.

The damage caused by the fruit tree rhynchites is characterized by the destruction of fruit buds and young leaves. Infested buds fail to develop, wilt, and eventually drop from the tree. In cases of high infestation levels, the loss of reproductive organs can be severe, leading to a substantial decrease in fruit set and overall tree vitality.

Effective management strategies require a combination of cultural and chemical methods. Cultural practices include tilling the soil beneath tree canopies to disrupt the pupation sites and manual collection of adults during the morning. Chemical control, utilizing approved insecticides, is most effective when applied during the initial stages of bud development to target adults before egg-laying occurs.