INDEX. 



o4o 



Mosiac disease of tobacco — Concluded. 

 Prevention and control — Concluded 

 Seedbed, changing location of, 

 Seedbed sterilization, 

 With formalin, . 

 With steam, 

 Summary, . . . . 



Mycological collection, reorganization of 

 Nature's Wonder Mineral Plant Food, vegetation test 

 Needs for development of station, 

 Nitrogen experiment (Field A), 



Yields per acre, 1917, 

 Olive oil, effect of air, light and moisture. 

 Onion diseases, ..... 

 Fly, control of, .... 



Orchard, experimental, started in Buckland, 

 Peach breeding, studies in, . 

 Phosphates, comparison of, . 



Yields per acre, 1917, 

 Pig meal. New Bedford, digestion coefficients, 

 Plant disease survey, .... 

 Plant diseases, prevalence in 1917, 



Apple scab, ..... 

 Bean anthracnose, .... 



Stem and root rot, 

 Brown rot, . . . . . 



Celery blight, ..... 

 Crown rot, ..... 

 Root rot, . . . . . 



Cranberry, fungous diseases of, . 

 Lawn grass, disease of, . 

 Mildew of cucumbers, 

 Mosaic disease of tobacco, 

 Onion blight, . 



Root rot. 

 Peach leaf curl, 

 Potato blight, . 

 Rhizoctonia, 

 Scab, . 

 Rose canker, . 

 Rust on Antirrhinum, 

 Plants, response to light, 

 Potash, comparison of muriate and high-grade sulfate 

 Salts, comparison of (Field G), 

 Yields per acre, 1917, 

 Potato diseases in 1917, . 

 Potato plant lice and their control. 

 Control measures, 



Summary, 

 Control, natural agents in, 

 Description, 

 Economic importance, 

 Life cycle. 

 Nature of injury, 

 Period of injury, 

 Spraying apparatus for, 



with, 



(Field B), 



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