



LIST OF DISEASES OF ECONOMIC PLANTS 19 



ALTHAEA— Continued. 



A. rosea, hollyhock — Continued. 



Colletotrichum malvarum (Braun and Casp.) E. A. Southworth, anthracnose. 



N. Y., Ohio, Ind., Iowa. 

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



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

 rot. Tex. 

 Phyllosticta althaeina Sacc, leaf -spot. N. Y., W. Va., Ohio. 

 Puccinia hibisciata (Schw.) Kell., rust. Nebr. 

 P. malvacearum C. G. Bertero, rust. General. 

 P. sherardiana Koern., rust. Calif. 

 Septoria fair mini Ell. and Ev., leaf-spot. N. Y. 



AMARYLLIS. 



A. belladonna, belladonna-lily. 

 Botrytis sp., rot. Calif. 

 Cercospora amaryllidis Ell. and Ev., leaf -spot. La. 



AMELANCHIER. 



Amelanchier sp., shadblow (*serviceberry, *juneberry, *shadbush, *saskatoon) 

 Bacillus amylovorus (Burr.) Trev. (Erwinia amylovora (Burr.) Com. S. A 



B.), blight. Wash. 

 Dimerosporium collinsii (Schw.) Thuem. General. 

 Erysiphe polygoni DC, powdery mildew. Mont. 

 Fabraea maculata (Lev.) Atk., leaf-blight. Ala., Ind., N. Dak., Kans., 



Mont., Idaho. 

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

 G. botryapites (Schw.) Kern, rust. Mass., Conn., N. Y., N. J., Pa. 

 G. clavariaeforme (Jacq.) DC, rust. N. Y. to Del., west to Utah. 

 G. corniculans Kern, rust. Vt. to Iowa, south to W. Va. 

 G. germinale (Schw.) Kern, rust. New England; N. Y., Mich., Wis. 

 G. inconspicuum Kern, rust. Colo., N. Mex., Utah. 

 G. juvenescens Kern, rust. Northern Great Plains States; Wis., Idaho. 

 G. kernianum Bethel, rust. Oreg. 

 G. nelsoni Arth., rust. Rocky Mt. States; Nebr. 

 G. nidus-avis Thax., rust. Mass. to Wis.; south to N. C. 

 Nummularia discreta (Schw.) Tul., blister canker. Mass., Ohio, Kans. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. Wash. 

 Phyllosticta innumerabilis Pk., leaf -spot. Nebr. 

 P. pauper cula Pk., leaf -spot. Kans. 



P. virginiana (Ell. and Hals.) Seaver, leaf-spot. N. Y., Pa., Wis. 

 Plowrightia morbosa (Schw.) Sacc, black-knot. Minn., Mont. 

 Podosphaera oxyacanthae (DC) D By., powdery mildew. Mass., Minn., Mo., 



Nebr. 

 Sclerotinia amelanchieris J. M. Reade, fruit-rot, blight. N. Y. 

 S. gregaria B. F. Dana, blight. Wash. 



AMMOPHILA. 



A. arenaria, beachgrass. 



Claviceps purpurea (Ft.) Tul., ergot. Mich. 



Ustilago striaeformis (West.) Niessl, stripe smut. New England Coast States. 



AMORPHA. 



A. fruticosa, indigobush. 



Cercospora passaloroides Wint., leaf-spot. Ala., 111., Nebr., Kans. 

 Uropyxis amorphae (Curt.) Schroet., rust. General east of Rocky Mts. 



AMPELOPSIS. 



A. arborea, peppervine. 



Cercospora arboriae Tharp, leaf-spot. Tex. 



C. viticola (Ces.) Sacc, leaf-spot. La. 



Guignardia bidwellii (Ell.) Viala and Ravaz, black-rot. Miss. 

 A. cordata, heartleaf ampelopsis. 



Cercospora truncata Ell. and Ev., leaf-spot. La. 



C. viticola (Ces.) Sacc, leaf-spot. Ala., La. 



