474 BACTERIAL DISEASES OF PLANTS 



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

 to John R. Johnston. 



14. Larkspur Blight Bacillus delphinii EFS. 



15. Alfalfa Stem and Leaf Blight Bad. medicaginis 

 (Sackett) EFS. 



16. Stem Blight of Field and Garden Peas Bad. pisi 

 (Sackett) EFS. 



17. Citrus Canker Bact. 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 Bact. beticolum Smith, Brown 

 and Townsend. 



21. Leaf Spot of Begonia. 



22. Leaf Spot of Pelargonium Bad. erodii Lewis. 



23. Aderhold and Ruhland's German Cherry Blight- 

 Bacillus spongiosus 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 Bact. stizolobii (Wolf) EFS. 



31. Celery Blight Bacillus apiovorus Wormald. 



32. Basal glume rot of wheat-^-Bacterium atrofaciens Lucia 

 McCulloch. 



33. Basket willow disease Bacillus harai Hori & Miyake. 



34. Tobacco Wildfire Bacterium tobacum 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. 



