LEAF DISEASES AND INJURIES 35 



Buckeye 



Uncinula flexuosa Peek, see page 121. 

 Butternut 



Microsphmra alni (Wallroth) Salmon 



Phyllactinia corylea Karsten 

 Catalpa 



MicrosphoBva alni var. vaccinii (Sohweinitz) Salmon 



Phyllactinia corylea Karsten 

 Chestnut 



MicrosphcBra alni (Wallroth) Salmon 



Phyllactinia corl/lea Karsten 

 Elm 



Microsphcera alni (Wallroth) Salmon, see page 153. 



Phyllactinia corylea Karsten, see page 153. 



Uncinula macrospora Peck, see page 153. 

 Hackberry 



Sphoerotheca phytoptophila Kellerman and Swingle, see page 174. 



Uncinula parvula Cooke and Peck, see page 173. 



Uncinula polychceta (Berkeley and Curtis) ElKs, see page 173. 

 Hickory 



Microsphmra alni (Wallroth) Salmon 

 Honey locust 



Microsphcera alni (Wallroth) Salmon 

 Maple 



Phyllactinia corylea Karsten, see page 227. 



Uncinula circinata Cooke and Peck, see page 227. 

 Oak 



Erysiphe trina Harkness, see page 241. 



Microsphcera alni (Wallroth) Salmon, see page 241. 



Microsphcera alni var. extensa (Cooke and Peek) Salmon, see page 

 241. 



Phyllactinia corylea Karsten, see page 241. 



Sphoerotheca lanestris Harkness, see page 243. 

 Poplar 



Uncinula solids (Fries) Winter, see page 300. 

 Sycamore 



Microsphcera alni (Wallroth) Salmon 

 Walnut 



Microsphrera alni (Wallroth) Salmon 



Phyllactinia corylea Karsten 

 Willow 



Phyllactinia corylea Karsten, see page 341. 



Uncinula salicis (Fries) Winter, see page 341. 

 Yellow poplar 



Phyllactinia corylea Karsten 



