Pear bud weevil

Anthonomus pyri


The pear bud borer is an important pest of pears. In autumn, the beetles destroy flower and leaf buds.

Aktuelle Warnungen

Current warning: Birnenknospenstecher, Steinobstknospenstecher

Regions: Österreich
Time period: 11.09.2023 - 31.10.2023

Im September kann an warmen Tagen mit dem Reifungsfraß und der Eiablage des Birnenknospenstechers (Kernobst) bzw. Steinobstknospenstechers (Steinobst) gerechnet werden. Bei warmer Witterung sind Kontrollen nach dem Auftreten der Knospenstecher mittels Klopfproben (Abklopfen der Rüsselkäfer von den Zweigen auf eine helle Unterlage) durchzuführen, um damit Behandlungsnotwendigkeit und –zeitpunkt zu ermitteln. Bei den Knospenstechern handelt es sich um ca. 5 mm große, braungraue Rüsselkäfer mit einer breiten, hellen Querbinde auf den Flügeldecken (siehe Bildmaterial). Beim Auftreten der Käfer haben Behandlungen noch jetzt im September nach der Ernte zu erfolgen.

Show warning details Aktuelle Warnungen abonnieren


The pear bud weevil is a brown-gray weevil (Curculionidae) about 5 mm long with a broad, pale cross band on the elytra.

The brightly colored larvae are about 6 mm in size, slightly curved and legless.


The pear bud borer(Anthonomus pyri) forms one generation per year.

Around the beginning of September, the beetle first performs a nibbling feast on foliage and flower buds of pear trees. After mating, the females lay their eggs individually in the flower buds. Still in autumn or not until the following spring the larva hatches, which hollows out the bud from the inside. After pupation (around May), the beetle hatches from the destroyed bud. Soon the beetle disappears again to seek an "oversummering hiding place" in crevices and bark cracks. It is not until early September that the beetle returns to the crown area of the pear trees.

Damage symptoms

In spring, infested flower buds do not sprout. The inside of the bud is eroded and the buds become brown and dry. A larva is found in the damaged buds, later a yellowish pupa.

Host plants

The preferred host plant is pear.


The pear bud borer occurs in Europe and Russia.

Economic importance

Since flower buds that have been occupied by an egg of the beetle will not sprout, there may be a significantly reduced flower set the next spring.

Prevention and control

  • From September, check for beetle emergence by tapping samples (tapping the beetles onto a light-colored support or into a collection funnel) and visually inspect buds for damage to determine need for and time of treatment.
  • Control of adult beetles at the time of ripening feeding in autumn with a plant protection product approved in Austria (see list of plant protection products approved in Austria)

Last updated: 11.04.2023

automatically translated