Darroll D. Skilling

World directory of forest pathologists and entomologists

How to identify and control rhizosphaera needlecast

How to identify and control rhabdocline and Swiss needlecasts of Douglas-fir

Controlling Lophodermium needlecast on Scotch pine Christmas trees

Brown spot needle disease

How to identify scleroderris canker

Scleroderris canker on national forests in upper Michigan and northern Wisconsin

Scleroderris canker of northern conifers

Growth of swamp conifers following an improvement cut

Pocket guide to red pine diseases and their management