Figure 3.1. Courtesy D. F. Ritchie. Reprinted from Ritchie, D. F. 2000. Bacterial spot of pepper and tomato. The Plant Health Instructor, DOI: 10.1094/PHI-I-2000-1027-01.

Figure 3.2. Courtesy D. L. Charbonneau and W. C. Ghiorse. Reprinted from Smiley, R. W., Dernoeden, P. H., and Clarke, B. B. 2005. Compendium of Turfgrass Diseases. 3rd ed. American Phytopathological Society, St. Paul, MN.

Figure 3.3. Used by permission of R. McCoy.

Figure 3.4. Courtesy R. E. Davis, USDA-ARS, Beltsville, MD.

Figure 3.5. Drawing by Vickie Brewster.

Figure 3.6. Courtesy University Archives, University of Illinois. Reprinted from Campbell, C. L., Peterson, P. D., and Griffith, C. S. 1999. The Formative Years of Plant Pathology in the United States. American Phytopathological Society, St. Paul, MN.

Figure 3.7. Courtesy M. P. Hoffmann. Reprinted from Zitter, T. A., Hopkins, D. L., and Thomas, C. E. 1996. Compendium of Cucurbit Diseases. American Phytopathological Society, St. Paul, MN.

Figure 3.8. Courtesy J. K. Pataky. Reprinted from Pataky, J. K. 2004. Stewart's wilt of corn. The Plant Health Instructor, DOI: 10.1094/PHI-I-2004-0113-01.

Figure 3.9. Courtesy S. T. Koike. Reprinted from Riley, M. B., Williamson, M. R., and Maloy, O. 2002. Plant disease diagnosis. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1021-01.

Figure 3.10. Courtesy M. L. Powelson. Reprinted from Stevenson, W. R., Loria, R., Franc, G. D., and Weingartner, D. P. 2001. Compendium of Potato Diseases. 2nd ed. American Phytopathological Society, St. Paul, MN.

Figure 3.11. Courtesy R. L. Forster. Reprinted from Kado, C. I. 2002. Crown gall. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1118-01.

Figure 3.12. Courtesy J. P. Jones. Reprinted from Jones, J. B., Jones, J. P., Stall, R. E., and Zitter, T. A. 1991. Compendium of Tomato Diseases. American Phytopathological Society, St. Paul, MN.

Figure 3.13. Courtesy J. M. Bové and M. Garnier. Reprinted from Fletcher, J., and Wayadande, A. 2002. Fastidious vascular-colonizing bacteria. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1218-02.

Figure 3.14. Courtesy B. Bextine. Reprinted from Fletcher, J., and Wayadande, A. 2002. Fastidious vascular-colonizing bacteria. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1218-02.

Figures 3.15 and 3.16. Drawings by Nancy Haver. Reprinted from Schumann, G. L. 1991. Plant Diseases: Their Biology and Social Impact. American Phytopathological Society, St. Paul, MN.

Figure 3.17. Courtesy T. R. Gottwald, copyright free. Reprinted from Gottwald, T. R. 2000. Citrus canker. The Plant Health Instructor, DOI: 10.1094/PHI-I-2000-1002-01.

Figure 3.19. Courtesy D. F. Ritchie.

Angular leaf spot. Courtesy S. T. Koike. Reprinted from Riley, M. B., Williamson, M. R., and Maloy, O. 2002. Plant disease diagnosis. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1021-01.

Bacterial streaming. Courtesy J. K. Pataky. Reprinted from Pataky, J. K. 2004. Stewart's wilt of corn. The Plant Health Instructor, DOI:10.1094/PHI-I-2004-0113-01.

Gall. Courtesy R. L. Forster. Reprinted from Kado, C. I. 2002. Crown gall. The Plant Health Instructor, DOI:10.1094/PHI-I-2002-1118-01.

Ooze. Courtesy M. P. Hoffmann. Reprinted from Zitter, T. A., Hopkins, D. L,. and Thomas, C. E. 1996. Compendium of Cucurbit Diseases. American Phytopathological Society, St. Paul, MN.

Phloem necrosis. Courtesy J. Fletcher. Reprinted from Fletcher, J., and Wayadande, A. 2002. Fastidious vascular-colonizing bacteria. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1218-02.

Scorch. Courtesy A. C. Goheen. Reprinted from Pearson, R. C., and Goheen, A. C. 1988. Compendium of Grape Diseases. American Phytopathological Society, St. Paul, MN.

Soft rot. Courtesy M. L. Powelson. Reprinted from Stevenson, W. R., Loria, R., Franc, G. D., and Weingartner, D. P. 2001. Compendium of Potato Diseases. 2nd ed. American Phytopathological Society, St. Paul, MN.

Wilt. Courtesy J. P. Jones. Reprinted from Jones, J. B., Jones, J. P., Stall, R. E., and Zitter, T. A. 1991. Compendium of Tomato Diseases. American Phytopathological Society, St. Paul, MN.

Witches' brooms. Courtesy J. M. Bové and Garnier, M. Reprinted from Fletcher, J., and Wayadande, A. 2002. Fastidious vascular-colonizing bacteria. The Plant Health Instructor, DOI: 10.1094/PHI-I-2002-1218-02.