Spruce up your yard! With cold-weather hardiness, evergreen beauty and a range of sizes and shapes, the many types of spruce ...

As a result, the trees are stressed and more susceptible. There are three major types of diseases that affect blue spruce trees: needlecasts, tip blights and canker diseases.

Norway spruce trees produce a mixture of substances as protection against insects and fungal infestation by Angela Overmeyer, Max Planck Society edited by Lisa Lock, reviewed by Robert Egan ...

image: European spruce bark beetle Ips typographus: The newly hatched young adult is still in the so-called pupal chamber at the end of the tunnel it created as a larva. It is surrounded by spores ...