The Pine Weevil, Pissodes approximatus Hopk., in Southern Ontario

Abstract

In recent years there have been marked increases in populations of a pine weevil, Pissodes approximatus Hopk., in southern Ontario, especially in areas where pine trees, particularly Scots pine, Pinus sylvestris L., are grown in pure stands for the Christmas tree market. In several such areas where large weevil populations have built up in the stumps of the previous year's cutting, damage to remaining trees by adults feeding on the twigs and small branches has been heavy. Not only has the quality and value of the trees been reduced by this damage, but in some instances the trees have been killed (5).