CONTENTS Page 3 Introduction Diseases incited by Bacteria and Fungi Gray Leafspot Bacterial Spot Verticillium Wilt Fusarium Wilt Southern Bacterial Wilt Phoma Rot Damping-Off Late Blight Early Blight Soil Rot Botrytis Gray Mold Southern Blight Stem Rot Leaf Mold Buckeye Rot Anthracnose Septoria Leafspot Nailhead Spot Minor Fruit Rots Fusarium Rot Oospora Rot Rhizopus Rot Bacterial Rot Myrotheecium Rot Nematospora Rot Diseases Incited by Viruses Tobacco Mosaic (Tomato Mosaic) Pseudocurly Top Page Veinbanding Mosaic (Potato-Y Virus) 58 Cucumber Mosaic 59 Double Virus Streak 62 Diseases Incited by Nematodes 63 Root Knot ........ 63 Diseases of Physiological or Uncertain Origin 66 Blossom-End Rot 66 Blotchy Ripening (Graywall) 69 Puffy Tomato 71 Sunscald .......... 72 Growth Cracks 74 Catface 75 Leaf Roll 76 Blossom-Drop 78 Crease Stem 79 Black Shoulder 81 Principles of Disease Control 81 Sanitation and Rotation 81 Seedbed Sterilization 83 Soil Sterilization with Methyl Bromide 83 Soil Sterilization with Other Fumigants 84 Soil Sterilization with Steam 84 Seed Treatment 85 Bichloride of Mercury ...... 85 Dry Seed Treatments 86 Fungicide Application 86 Fungicides for Disease Control 88 Since the initial preparation of this bulletin, "Walter", a race 2-resistant variety has been released. Page 13 & 15