. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1100 Canadian Forestrij Journal, May. 1917 4. 1 Warning Re White Pine Disease 1 I I. WHITE PINE BLISTER RUST. Photos by \V. A. McCubbin. (a) Early stage of white pine blister rust showing typical swelling. (b) Branch of white pine completely girdled by disease. (c) Appearance of infected white pine during May and June. These are days when everyone in or near white pine ought to be scout- ing for white pine bhster. The following is taken from Dr. Gussow's excellent pamphlet, written for the Canadian Forestry Associa-' tion
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1100 Canadian Forestrij Journal, May. 1917 4. 1 Warning Re White Pine Disease 1 I I. WHITE PINE BLISTER RUST. Photos by \V. A. McCubbin. (a) Early stage of white pine blister rust showing typical swelling. (b) Branch of white pine completely girdled by disease. (c) Appearance of infected white pine during May and June. These are days when everyone in or near white pine ought to be scout- ing for white pine bhster. The following is taken from Dr. Gussow's excellent pamphlet, written for the Canadian Forestry Associa-' tion. Copies with detailed illustra- tions will be sent upon request. "The first and most essential point is to know the disease. If everybody made it his business, when in the woods, every camper, every hunter, every Boy Scout, every lover of our beautiful forests, and, most of all, every forester and wood man, from lumber-jack to owner—to know, re- cognize, and immediately report, where the disease was observed, and, if in doubt he send a specimen to those who know it, then we may hope to cope with it before it is too late. The disease is most, of all dangerous to the young pine. When it attacks • the main stem,—and as many as one hundred separate infections and more have been observed on one tree—and girdles "it, which it is sure to do eventually, the tree dies. During May and June each year, this disease can be recognized by any one looking for the following symptoms even if we have no training; later on, only experts can determine it. All know the appearance of the fine smooth dark green bark of stem and branches of this white pine. But does every- body know the white pines from other pines? Of course he knows that the white pines have five needles or leaves in a cluster, while others have but two or three. To make sure of this, he need only cut or pull off a cluster. Please note that these images are extracted from scanned page images that may have been digi
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