Einige Beobachtungen über Schäden und Schädlinge in Pinus‐radiata ‐Anpflanzungen bei Valparaiso 1

Summary The primary causes of dieback in some Pinus radiata stands near Valparaiso, Chile, are unsuitable site and climate. Some fungi, Sclerophoma magnusiana and Spaeropsis sp. as well as the Adelgid Pineus börneri Ann. seem to be of secondary importance. The latter is well controlled by a Dipterous larva, Leucopis spec., new to the fauna of Chile. In the bark of dead and dying trees some secondary phloëmeaters are found. Under thin bark the larvae of an Aegeriid moth are often feeding, under the thicker bark the larvae of a Buprestid and of some Cerambycid beetles. One of them was identified as Callideriphus laetus Blanch., a Cerambycid, indigenous in Chile but not found attacking Monterey pine until now. Blue stains are often present in the infested truncs. The bark of pines damaged by fire was gnawed through by numerous larvae of Ernobius mollis L. The radiata ‐stands obviously are in danger of getting highly susceptible to attacks of secondary fungi and insects when the precipitations are lower than normal.