LIST OF DISEASES OF ECONOMIC PLANTS 13 



ABIES — Continued. 



A. magnified, red fir — Continued. 



Herpotrichia nigra Hartig, matting. Calif. 



Lophodermium nervisequium (DC.) Rehm, needle cast. Calif. 



Polyporus schweinitzii Fr., red-brown butt-rot. General with host. 



P. sulphureus (Bull.) Fr., brown-checked wood-rot. 



Razoumofskya douglasii (Engelm.) Piper, mistletoe. Calif. 



R. occidentals abietina (Engelm.) Coville, mistletoe witches'-broom. Oreg., 



Calif. 

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



Calif. 

 A. nobilis, noble fir. 



Echinodontium tinctorium Ell. and Ev., brown stringy rot. Common in 



Western States. 

 Fomes pinicola Fr., brown crumbly rot. Common with host. 

 Hypoderma robustum Tub., needle cast. Oreg. 

 Hypodermella abietis-concoloris Dearn., needle cast. Oreg. 

 Polyporus schweinitzii Fr., red-brown butt-rot. General. 

 Pucciniastrum pustulatum (Pers.) Diet., rust. Oreg. 

 Razoumofskya douglasii (Engelm.) Piper, mistletoe. Wash. 

 R. occidentals abietina (Engelm.) Coville, mistletoe witches'-broom. Oreg. 

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



Common within range of host. 

 Uredinopsis pteridis Diet, and Holw., rust. Oreg. 

 A. veitchii, Veitch fir. 



Fusicoccum abietinum (Hartig) Prill, and Del. Ohio. 

 ACACIA. 

 A. farnesiana, sweet acacia. 



Ravenelia australis Diet, and Neg., rust. Tex. 

 R. siliquae Long, rust. Tex., N. Mex. 



ACER. 



A. circinatum, vine maple. 



Cytospora chrysosperma (Pers.) Fr., canker. Mont. 



Nectria galligena Bres., European canker. Oreg. 



Septoria aceris-macrophylli Pk., leaf -spot. Wash. 



S. circinata Ell. and Ev., leaf -spot. Wash., Oreg. 

 A. dasycarpum, silver maple. 



Fomes fomentarius (L.) Fr., white sapwood rot. 



F. igniarius (L.) Fr., white heart-rot. Vt., N. Y. 

 Gloeosporium acerinum West., leaf -blight. Kans., Mo. 



G. apocryptum Ell. and Ev., leaf -blight. N. J. 

 Pholiota adiposa Fr., wood-rot. Del. 

 Phoradendron flavescens (Pursh) Nutt., mistletoe. Ind. 

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

 Phyllosticta minima (Berk, and Curt.) Ell. and Ev., leaf -spot. General east 



of Great Plains. 

 P. minutissima Ell. and Ev., leaf -spot. Wis. 

 Polyporus delectans Pk. D. C. 



Rhytisma acerinum (Pers.) Fr., tar-spot. General east of Great Plains. 

 Septogloeum acerinum (Pass.) Sacc, leaf -spot. Ala. 

 Septoria acerina Pk., leaf -spot. N. Y. 



S. saccharina Ell. and Ev., leaf-spot. New England, N. Y., Wis. 

 S. salliae W. R. Gerard, leaf-spot. N. Y. 

 Taphrina sp., leaf blister. Mich. 

 Uncinula circinata Cke. and Pk., powdery mildew. General east of Great 



Plains. 

 Verticillium sp., wilt. Va. 

 A. glabrum, Rocky Mountain maple. 



Cylindrosporium consociatum Dearn., leaf -spot. Pacific Northwest. 

 Cytospora chrysosperma (Pers.) Fr., canker. Mont., Pacific Northwest. 

 Fomes igniarius (L.) Fr., white heart-rot. Central States. 

 Phyllosticta minima (Berk, and Curt.) Ell. and Ev., leaf-spot. Rocky Mts. 



and Pacific Northwest. 



