Tatianaerhynchites aequatus (Linnaeus, 1767)
apple fruit rhynchites
on woody Rosaceae
The female makes a hole in a fruit and deposits an egg on the developing seed. Next she partly severs the fruit stalk, thereby interrupting the development; ultimately the fruit is dropped and starts to rot. After the larva has completed its development, feeding on the seed, it leaves the fruit and pupates in the soil.
Univoltine. Part of the larvae pupate in the end of the summer, another part enters for a full year in diapause before pupation. The adult beetle emerge the same season when they pupated.
distribution within Europe
Fallen fruits of the plants mentioned above are usually occupied by the fungus Monilinia fructigena. Dieckmann makes the intriguing suggestion that the fungus might be actively transmitted by the beetle, and have a positive effect on the success of the larva.
Dieckmann (1974a), Legalov & Friedman (2007a), Rheinheimer & Hassler (2010a), Roques, Cleary, Matsiakh & Eschem (2017a).