TABLE OF CONTENTS Page INTRODUCTION 1 METHODS 1 HOSTS 1 Table 1.—Summary of mountain pine beetle infestations by hosts in Oregon and Washington 1955-66 2 LODGEPOLE PINE 3 History 3 Damage classification 3 Location of damage 3 Control measures 4 Table 2.—Trend of mountain pine beetle infestations in lodgepole pine in Oregon and Washington by reporting area 1955-66 4 Table 3.—Extent and estimated volume of lodgepole pine killed by the mountain pine beetle in Oregon and Washington by reporting unit 1955-66 5 Figure 1-1.—Regional trend of mountain pine beetle infestations in lodgepole pine 1955-66 6 Figure 1-2.—Oregon lands 7 Figure 1-3.—Oregon lands 8 Figure 1-4.—Washington lands 9 Figure 1-5.—Washington lands 10 PONDEROSA PINE 11 History 11 Damage classification 11 Location of damage 12 Control measures 13 Table 4.—Trend of mountain pine beetle infestations in ponderosa pine in Oregon and Washington by reporting area 1955-66 14 Map 1.—Mountain pine beetle infestations in lodgepole pine stands Oregon and Washington 1955-66 15 Map 2.—Mountain pine beetle infestations in ponderosa pine stands Oregon and Washington 1955-66 16 Map 3.—Mountain pine beetle infestations in western white pine stands Oregon and Washington 1955-66 17 Map 4.—Mountain pine beetle infestations in sugar pine stands Oregon and Wash ington 1955-66 18 Table 5.—Extent and estimated volume of ponderosa pine killed by the mountain pine beetle in Oregon and Washington by reporting unit 1955-66 19 Figure 2-1.—Regional trend in mountain pine beetle infestations in ponderosa pine 1955-66 20 Figure 2-2.—Oregon lands 21 Figure 2-3.—Oregon lands 22 Figure 2-4.—Washington lands 23 Figure 2-5.—Washington lands 24 WESTERN WHITE PINE 25 History 25 Damage classification 25 Location of damage 25 Control measures 25 Table 6.—Trend of mountain pine beetle infestations in western white pine in Oregon and Washington by reporting area 1955-66 26 Table 7.—Extent and estimated volume of western white pine killed by the mountain pine beetle in Oregon and Washington by reporting unit 1955-66 .. 27 iii TABLE OF CONTENTS (Continued) Page Figure 3-1.—Regional trend of mountain pine beetle infestations in western white pine 1955-66 28 Figure 3-2.—Oregon lands 29 Figure 3-3.—Oregon lands 30 Figure 3-4.—Washington lands 31 Figure 3-5.—Washington lands 32 SUGAR PINE 33 History 33 Damage classification 33 Location of damage 33 Control measures 34 Table 8.—Trend of mountain pine beetle infestations in sugar pine in Oregon by reporting area 1955-66 34 Table 9.—Extent and estimated volume of sugar pine killed by mountain pine beetle in Oregon by reporting unit 1955-66 34 Figure 4-1.—Regional trend of mountain pine beetle infestations in sugar pine 1955-66 35 Logging infested trees reduces beetle populations and saves timber values. IV Figure 4-2.—Oregon lands 36