Table of contents Introduction 2 Warm springs reservation 12 I History of control 12 II Results 15 Table no. I 15 Table No. II. 16 Beetle control map 22 Klamath reservation 23 I History of control work 23 II results 25 Table no. III. 26 Beetle control map 27 Yakima Reservation 32 I. Brief history of the infestation 32 II. Control work 32 Table no. IV 34 III Relative efficiency of winter control work 34 IV results 35 Table no. V. 36 V pine beetle survey and sample plots 36 VI areas covered by treating 36 Vii conclusions 37 Beetle control map 36 Recent pine beetle control activities of the U.S. Forest Service in Oregon 41 Table no. VI 45 Table no. VII 46 Conclusions and recommendations 47 I. Control by the Forces of Nature 47 II. Control by forest management 52 III. /control by feeling and burning 56 a. Brief review of control works on the Klamath 58 b. Brief review of the costs of control work and plans for future work on the warm springs reservation 62 c. Brief review of the costs of control work and plans for future work on the Yakima reservation 63 Photographs All of the photographs included with this report are enlargements made from pictures taken by the writer with a miniature leica camera equipped with interchangeable elmar 50 am f 3.5 and 35 mm f 3.5 lenses. All distant views were taken with an infra red filter. Films used were panatomic and supersensitive.