File:1916. P. Sergent with ponderosa pine and Dendroctonus brevicomis (western pine beetle) insect study cage. Muslin cage was used to force beetles to attack freshly-cut yellow pine log. Near Ashland, Oregon. (33469760652).jpg
Jump to navigation
Jump to search
![File:1916. P. Sergent with ponderosa pine and Dendroctonus brevicomis (western pine beetle) insect study cage. Muslin cage was used to force beetles to attack freshly-cut yellow pine log. Near Ashland, Oregon. (33469760652).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/1916._P._Sergent_with_ponderosa_pine_and_Dendroctonus_brevicomis_%28western_pine_beetle%29_insect_study_cage._Muslin_cage_was_used_to_force_beetles_to_attack_freshly-cut_yellow_pine_log._Near_Ashland%2C_Oregon._%2833469760652%29.jpg/800px-thumbnail.jpg?20180503233512)
Size of this preview: 800 × 532 pixels. Other resolutions: 320 × 213 pixels | 640 × 426 pixels | 1,024 × 681 pixels | 1,280 × 851 pixels | 2,220 × 1,476 pixels.
Original file (2,220 × 1,476 pixels, file size: 394 KB, MIME type: image/jpeg)