Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Monitoring of carpophages of pine (Pinus spp.) cones and seeds.

Abstract

Results are presented of a survey of carpophagous species in pine (Pinus spp.) cones in Slovakia. A total of 2856 cones of Scots pine (Pinus sylvestris) was analysed in 1992-97. The pine weevil Pissodes validirostris was the most important pest with an average rate of cone attack 3.17% at the main cone collection. Extensive surveys of Pinus mugo revealed no direct damage; fructification could be affected indirectly by shoot damage caused by Rhyacionia buoliana or Blastesthia posticana. The occurrence of the pine knothorn moth (Dioryctria abietella) was sporadic. Larvae of Cydia conicolana were observed in cones and seeds of Austrian pine (Pinus nigra). Cone samples of the alpine stone pine (Pinus cembra) analysed in 1994 indicated larval infestation of D. abietella to be at a rate of 54 and 58%.