474 BACTERIAL DISEASES OF PLANTS 



13. Coconut Bud Rot — Some form of Bacillus coli, according 

 to John R. Johnston. 



14. Larkspur BUght — Bacillus delphinii EFS. 



15. Alfalfa Stem and Leaf Blight — Bad. 7nedicaginis 

 (Sackett) EFS. 



16. Stem Blight of Field and Garden Peas — Bact. pi si 

 (Sackett) EFS. 



17. Citrus Canker — Bad. citri (Hasse) Jehle. 



18. Lettuce Blight — Bad. aptatum Nellie A. Brown. 



19. Metcalf 's Soft Rot of Sugar Beet — Aplanobacter teutlium 

 (Metcalf) EFS. 



20. Tubercle of Sugar Beet — Bad. hdicolmn Smith, Brown 

 and Townsend. 



21. Leaf Spot of Begonia. 



22. Leaf Spot of Pelargonium — Bad. eroclii Lewis. 



23. Aderhold and Ruhland's German Cherry Blight — • 

 Bacillus spo7igiosus Aderh. and Ruhl. 



24. Barss' Cherry Blight of Washington and Oregon (which 

 is probably the same as No. 23). 



25. Angular Leaf Spot of Cucumber — Bact. lachrymans 

 Smith & Bryan. 



26. Spieckermann's ring rot of Potato. Aplanobacter sep- 

 edonicum (Spk.) EFS. 



27. Black Chaff of Wheat — Bacterium translucens var. un- 

 dulosum Smith, Jones & Reddy. 



28. Halo Blight of Oats — Bact. coronafaciens Charlotte Elliott. 



29. Leaf Spot of Soy Bean^ — Bact. glycineum F. C. Coerper. 



30. Velvet Bean Leaf Spot— 5ad. stizolohii (Wolf) EFS. 



31. Celery Blight — Bacillus apiovorus Wormald. 



32. Basal glume rot of wheat — Bacteriu?n atrofaciens Lucia 

 McCulloch. 



33. Basket willow disease — Bacillus harai Hori & Miyake. 



34. Tobacco Wildfire — Bacterium tohacum Wolf and Foster. 



II. SUGGESTION OF SUBJECTS FOR SPECIAL STUDY 

 LARGER PROBLEMS 



1. The natural immunity of plants. 



2. Acquired immunity in plants. Effect of hybridization. 

 Search for resistant species and varieties. 



