xii CONTENTS. 



CHAPTER VII. 



PAGE 



SCAB AND CRACKING OF POTATOES 37 



CHAPTER VIII. 

 NEW DISEASE OF ONIONS. Puccinia mixta, Fl. . . 39 



CHAPTER IX. 



MILDEW OF ONIONS. Peronospora Schleideniana, Ung. . 45 



CHAPTER X. 

 MOULD OF ONIONS. Mucor suUilissimus, B. . . .51 



CHAPTER XL 

 ONION SMUT. Urocystis cepulce, Far 54 



CHAPTER XII. 



NEW DISEASE OF GRASS. Isaria fuciformis, Berk. . 55 



CHAPTER XIII. 

 STRAW BLIGHT 69 



CHAPTER XIV. 



SURFACE MILDEW OF TURNIPS. Oidium Balsamii, Mont. 75 



