28 APPLE BLOTCH IN SOUTHERN ORCHARDS. 



Page. 



Diseases, apple, comparative damage to crop 7-8 



control, course of spraying recommended 22-23 



demonstration work of Department of Agriculture 7, 17-20 



Fruit blotches, appearance, development, and damage to apples 9-10 



Fungus, apple-blotch, cultural characters 15 



growth in fruit 14 



hibernation in twig cankers 10,14-15 



identification, study 9, 13 



life history, study 13-17 



canker, relation to fruit blotches, inoculation experiments 16-17 



Gipple, H. W., study of fruit-bud disease and its relation to apple-blotch fungus. 10-11 

 Infection, apple blotch, by inoculation with twig-canker fungus, experiments. . 16-17 



periods, observations 12, 21 



source, study 12, 13-15 



Inoculation experiments, apple-blotch fungus 16-17 



Introduction to bulletin 7-9 



Leaf-spot diseases, apple 11 



Leaves, apple-blotch infected, appearance 11 



Limbertwig apple trees, experiments for control of apple blotch, results 18 



Lime, use in Bordeaux mixture 20-21 



Media, culture, apple-blotch fungus 15 



Mycelium, apple-blotch fungus, development 14, 15 



Northwestern Greening apple trees, destruction by apple blotch 10 



Orchard, spraying with Bordeaux mixture for apple-blotch control, experi- 

 ments 17-20 



southern, course of treatment for control of apple diseases 22-23 



Ozark plateau, prevalence and destructiveness of apple blotch 7-8 



Phyllosticta, disease, identification of apple blotch 7, 8, 13 



solitaria, fungus causing apple blotch 9, 13 



Plates, description 25 



Pruning, relation to development and control of apple blotch 21-22 



Pycnidia, development on apple-blotch spots 9, 10, 11, 14, 15 



Pycnospores, production and germination on young green fruit 15 



Quaintance, A. L. , schedule for spraying for codling moth 22 



study of apple blotch 8 



Rainfall, relation to late development of apple blotch 17-18 



Scab, apple, control, course of spraying - 22-23 



Sheldon, study for identification of apple-blotch fungus 8-9, 13 



Sphaeropsis malorum. black-rot fungus, attack on fruit buds 10-11 



Spores, apple-blotch, description, production, germination, etc 14-15 



Spraying, course recommended for control of apple diseases 22-23 



for apple blotch, experiments at Bentonville and Gravette, Ark 17-21 



value of early applications 17-19, 21 



outfit for applying Bordeaux mixture 21 



Twig cankers, effect on tree 10-11 



relation to fruit blotches, observations and experiments 12. 



13-15, 16-17 



Varieties of apples immime to apple blotch 12-13 



susceptible to apple blotch 12-13 



Weather conditions, relation to development of apple blotch 12, 17-18 



Winesap apple, course of spraying recommended for disease control 23 



immunity to apple blotch 11, 12, 13, 23 



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