Scots pines and a pine log pile (3 m long logs) ready for loading. Pine logs must be taken away before pine shoot beetles Tomicus piniperda and T. minor emerge in July. Otherwise, the beetles will fly to the crowns of pine trees and bore into the shoots which later in the winter will fall off. Thus, the beetles cause most economic damage by tree growth reduction since trees must replace the shoots (which normally their needles might live 7 or more years). Note the drain pipe traps with funnels baited with monoterpenes for catching pine shoot beetles.

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Images © 1996 by John A. Byers, Chemical Ecology.