CONTENTS 



PAGE 



Object of the investigation 3 



Importance of meadow crops in the State 4 



Survey of the meadow-crop diseases of the State 5 



The necessity of a method for determining loss 5 



Distribution of meadow crops 5 



Method of determining meadow-crop distribution 5 



Method of gathering data in the field 5 



Economic importance 7 



Nature of loss 7 



Amount of loss 8 



Method of determining relative importance 8 



Method of determining absolute loss 8 



Losses induced by diseases in meadows 12 



Discussion of specific diseases 14 



Diseases of legumes 14 



Macrosporium leaf spot 14 



Clover rusts 27 



Pseudopeziza leaf spot 35 



Powdery mildew of clover 41 



Cercospora leaf spot 53 



Sooty blotch of clover 58 



Pseudoplea leaf spot 63 



Clover mosaic 68 



Kabatiella anthracnose of clover 70 



Stagonospora leaf spot 75 



Girdle 78 



Bacterial leaf spot 78 



Fusarium root rots 78 



Downy mildew 79 



Dodder 79 



Rhizoctonosis 79 



Sclerotinia stem canker 79 



Thielavia root rot 79 



Black stem 79 



Diseases of grasses 80 



Heterosporium leaf spot of timothy 80 



Timothy rust 87 



Cercospora leaf spot of grasses 97 



Helminthosporium leaf spot of blue-grass 101 



Helminthosporium leaf spot of orchard grass and red top 114 



Timothy smut 115 



Silver top 115 



Powdery mildew 115 



Piricularia leaf spot of foxtail 115 



Other diseases 116 



Discussion and summary 116 



Bibliography 123 



