438 SPECIAL PLANT PATHOLOGY 



GUAVA 



{Psidium guajava, L.) 



Ripe-rot (Glomerella psidii (G. Del.) Sheldon). 



Stevens & Hall, Diseases of Economic Plants, p. 191 (1910). 

 W. Va. Bull. 104, pp. 299-315 (April, 1906). 



Hackberky 



(Celiis spp.) 



Leaf-spot {Cylindrosporium defoliatum, Heald and WoU and (Ramularia celtidis, 



EU. & KeU.). 

 Powdery Mildew (Uncinula polychala, Bri. and Cav.). 



Hazel 



{Corylus spp.) 



Black-knot (Crypiospordla anomala (Pk.), Sacc). 



Descr. Illus.,Mass. Agr. Exp. Sta., Rep. 10, 1892, p. 242 (1893). 

 Treat, (rec.), Mass. Agr. Exp. Sta., Rep. 10, 1892, p. 243 (1893). 



Hemlock 

 {Tsuga canadensis (L.), Carx.) 



Dry-rot {Trametes pint (Brot), Fr.). 



Descr. Illus., U. S. Dep. Agr., Div. V^. Phys. & Path., Bull. 25 (1900). 

 Heart-rot {Polyporus borealis (Wahl.), Fr.). 



Bull. 193 Com. Univ. Agr. Exp. Sta. (June, 1901). 

 Timber Rot (Fames pinicola, Fr.). 



Graves, A. H., Phytopath. 4, p. 69 (April, 1914). 

 Wet-iot {Polyporus subaciduSjFk. ?). 



Descr. Illus., U. S. Dep. Agr., Div. Veg. Phys. & Path., BuU. 25 (T900). 

 Rust (Peridermium Peckii, Thum.) . 



Phytopath. i, pp. 94-96 (1911). 



Hemp 



(Cannabis saliva, L.) 



Leaf- wilt (Botryosphasria Marconii (Cav.), Charles & Jenkins). 

 Joum. of Agr. Research 3, pp. 81-84 (Oct 15, 1914). 



Hickory 

 (Carya spp.) 

 Leaf-spot (Marsonia juglandis (Lib.), Sacc). 



