LIST OF DISEASES OF ECONOMIC PLANTS 59 



IIBOCEDRUS. 



L. decurrens, incense-cedar. 



Gymnosporangium blasdaleanum (Diet, and Holw.) Kern, rust. Oreg., Calif. 

 Herpotrichia nigra Hartig, matting. Calif. 



Phoradendron juniperinum libocedri Engelm., mistletoe. Nev., Oreg., Calif. 

 Polyporus amarus Hedge, pecky heartwood rot. Oreg., Calif. 



IIGUSTRUM. 



Ligustrum sp., privet. 



Armillaria mellea (Vahl) Quel., root-rot. Miss. 



Bacterium tamefaciens EFS. and Town. (Phytomonas tumefaciens (EFS. and 



Town.) Com. S. A. B.), crown-gall. Miss. 

 Cercospora adusta Heald and Wolf, leaf-spot. Tex. 

 C. ligustri Roum., leaf-spot. Miss. 



Exosporium concentricum Heald and Wolf, leaf-spot. Tex. 

 Glomerella cingulata (Ston.) Spauld. and Schrenk, anthracnose. Widespread 



east of Great Plains. 

 Heterodera radicicola (Greef) Muell., root-knot. Miss. 

 Ozonium omnivorum Shear (Phymatotrichum omnivorum (Shear) Dug.), 



root-rot. Tex. 

 Phyllosticta ovalifolii Brun., leaf -spot. Tex. 



LILIUM. 



Lilium spp., lily (mostly native species) . 



Corticium vagum Berk, and Curt,, stem-rot. Mich. 



Uromyces holwayi Lagh., rust. Widespread. 

 L. longiflorum, Easter lily. 



Botrytis cinerea Auct., gray-mold. Fla. 



Cercospora unicolor Sacc. and Penz., leaf-spot. Fla. 



Fusarium sp., wilt. Fla. 



Sclerotinia sclerotiorum (Lib.) Mass., wilt. Fla. 



IINUM. 



IL. usitatissimum, flax. 

 Alternaria sp., boll disease. Minn., N. Dak. 

 Colletotrichum linicolum Peth. and Laf., anthracnose. Mich., Minn., N. 

 Dak., Mont. 

 Fusarium lini H. L. Bolley, wilt. General in States where flax is grown. 

 Heterodera radicicola (Greef) Muell., root-knot. 

 Macrosporium sp., blight. N. Dak. 

 Melampsora lini (Schum.) Desm., rust. General. 



Phlyctaena linicola Speg., pasmo. Mich., Wis., Minn., N. Dak., S. Dak. 

 Rhizoctonia sp., root-rot. Minn., N. Dak. 

 Heat canker, nonpar. Wis., Minn., N. Dak., S. Dak., Mont., Idaho. 



LIQUIDAMBAR. 



L. styraciflua, sweetgum. 



Cercospora liquidambaris Cke. and Ell., leaf-spot. Md., Ga., Gulf States. 



C. tuber xulans Ell. and Ev., leaf -spot. La., Miss., Mo. 



Hymenochaete agglutinans Ell., twig-blight. 



Ozonium omnivorum Shear (Phymatotrichum omnivorum (Shear) Dug.), 



root-rot. Tex. 

 Phoradendron flavescens (Pursh) Nutt., mistletoe. Ohio, Tex. 

 Septoria liquidambaris Cke. and Ell., leaf -spot. Mass., N. J., Ga. 

 Stereum subpileatum Berk, and Curt., honeycomb heart-rot. Fla. 



URIODENDRON. 



L. tulipifera, tuliptree. 



Cercospora liriodendri Ell. and Hark., leaf-spot. Middle Atlantic States, 



Gulf States. 

 Cylindrosporium cercosporoides Ell. and Ev., leaf -spot. Md. 

 Erysiphe polygoni DC, powdery mildew. General over range of host. 

 Gloeosporium liriodendri Ell. and Ev., anthracnose. Conn., Del., Tex., 



Ohio. 

 Myxosporium longisporium Edg., twig canker. N. Y. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. N. Y., Ala., Ind., 111. 



