

LIST OP DISEASES OF ECONOMIC PLANTS 103 



TRITICUM— Continued. 



T. aestivum, wheat — Continued. 



Tylenchus tritici (Stein.) Bast., nematode. N. Y., Va., W. Va., N. C, S. C, 

 Ga., Calif. 



Urocystis tritici Koern., flag-smut. 111., Mo., Kans. 



Ustilago tritici (Pers.) Rostr., loose-smut. Widespread. 



Wojnowicia graminis (McAlp.) Sacc. and D. Sacc, foot-rot. N. Y., Kans., 

 Ark., Oreg. 



Black-point, associated with Helminthosporium spp. N. Dak. 



Mosaic, undet. Nebr., Ind., 111. 



Rosette, undet. 111., Ind. 



Sterility, undet. Minn., N. Dak., Kans., Mo., Tex. 



Stripe, undet. N. Y., Pa., 111. 

 *T. dicoccum, emmer. 



Ophiobolus graminis Sacc, take-all. N. Y. 



Puccinia glumarum (Schm.) Eriks. and Henn., stripe-rust. Idaho. 



P. graminis Pers., stem-rust. Tex., Okla., Mo., Wash. 



P. triticina Eriks., leaf-rust. Ga., Tex. 



Septoria nodorum Berk., glume-blotch. Md. 



Tilletia tritici (Bjerk.) Wint., bunt. N. Dak. 



Tylenchus tritici (Stein.) Bast., nematode. Va. 

 *T. spelta, spelt. 



Colletotrichum graminicolum (Ces.) Wils., anthracnose. 111. 



Gibberella saubinetii (Mont.) Sacc, scab. Md., 111., Minn. 



Ophiobolus graminis Sacc, take-all. N. Y. 



Puccinia glumarum (Schm.) Eriks. and Henn., stripe-rust. Idaho. 



P. graminis Pers., stem-rust. Mo., Minn., N. Dak., Kans., Wyo., Wash. 



P. triticina Eriks., leaf-rust. Wis., Minn., Tex. 



Tilletia tritici (Bjerk.) Wint., bunt. N. Dak. 



Tylenchus tritici (Stein.) Bast., nematode. Va. 



Ustilago tritici (Pers.) Rostr., loose-smut. N. Y. 



TROPAEOLUM. 



T. majus, nasturtium. 



Alternaria sp. (associated with Pleospora), black-mold. N. J. 



Bacterium aptatum N. Brown and Jamieson (Phytomonas aptatum (Brown 



and Jamieson) Com. S. A. B.), leaf -spot. N. J., Miss. 

 B. solanacearum EFS. (Phytomonas solanaceara (EFS.) Com. S. A. B.), 



bacterial wilt. Md., Va., Fla. 

 Cercospora tropaeoli Atk., leaf-spot. Ala. 

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

 Pleospora tropaeoli Hals., leaf -spot. Ohio. 

 Puccinia sarcobati (Pk.) Bethel, rust. Utah (a single report). 



TSUGA. 



T. canadensis, Canada hemlock. 



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



Fomes pinicola Fr., brown crumbly rot. General in Northeastern States. 



F. roseus (Alb. and Schw.) Fr., brown pocket rot. N. Y. 



Hymenochaete agglutinans Ell. Pa. 



Hypoderma brachysporum (Rostr.) Tub., leaf -cast. Vt. 



Keithia tsugae (Farl.) E. J. Durand, leaf-blight. N. H., Wis. 



Melampsora abietis-canadensis (Farl.) C. A. Ludwig, rust. New England; 

 N. Y., and westward to northern Wis. 



M. farlowii (Arth.) Davis, rust. New England. 



Polyporus borealis Fr., cuboidal rot. N. Y. 



Pucciniastrum hydrangeae (Berk, and Curt.) Arth., rust. Va. 



P. myrtilli (Schum.) Arth., rust. New England, N. Y., Pa., Va., W. Va., 

 N. C, Ind. 



Trametes pini (Brot.) Fr. {Fomes pini (Thore) Karst.), honeycomb rot. 

 T. heterophylla, western hemlock. 



Botrytis sp., seedling twig-blight. Idaho. 



Caeoma dubium C. A. Ludwig, rust. Wash., Oreg. 



Dimerosporium tsugae Dearn., sooty mold. Wash., Oreg. 



