| imageID: | 17722 |
| Description: | A 20 inch d.b.h. blackjack dying in the crown not due to rust. |
| Keywords: | limb rust forest pathology |
| Organisms: | ponderosa pine |
| Original collection id: | 1507 |
| Media: | B&W print 4 x 5 in. and safety negative |
| Collection: | RMRS Archive Images |
| Quality: | 3 |
| Location: | Apache National Forest; AZ; United States |
| Date(mm/yyyy): | 7/1951 |
| Comments: | Picture used in the Apache National Forest Cronartium filamentosum Rust survey by F.G. Hawksworth. |
| Citation: | Use of this image is governed by Creative Commons CC BY. If you use the image, please include the following citation: USDA Forest Service. 2007. Forest Service Research Image Library. Fort Collins, CO: Forest Service Research Data Archive. https://www.fs.usda.gov/rds/imagedb |
Your help is appreciated. If you see an image that has any inaccuracy please send a note to the Archive team. Thank you!

