Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Seasonal changes in the spatial distribution of feeding by the pine weevil Hylobius abietis in Scots pine plantations.

Abstract

Studies of feeding intensity were made in 5 forest districts in Poland using the trap bolt method described earlier. Bolts were placed every 6 m along one row (25 bolts per row) at the margin (3-6 m from the edge), one in the middle (32-40 m from the edge) and one at 16-20 m from the edge of an 80-m wide 1-yr-old Scots pine [Pinus sylvestris] stand established on recently felled areas. In early May, greatest feeding intensity was near the edge and least in the middle of the stand, whereas from mid-June the pattern was reversed. Average values for 4 forest districts showed that feeding intensity during June to August was 3.1× greater in the middle of plantations than at the edge.