86 BULLETIN 1366, IT. S. DEPARTMENT OE AGRICULTURE 



PRUNUS — Continued. 



P. americana, American wild plum — Continued. 

 Septoria pruni Ell., leaf -spot. Ky., Kans. 

 S. purpureocincta Ell. and Ev., leaf -spot. Kans. 

 Tranzschelia punctata (Pers.) Arth., rust. General over range of host. 



PSEUDOTSUGA. 



P. douglasii, Douglas fir. 



Botrytis cinerea Auct., gray -mold twig-blight. Conn. 

 Corticium vagum Berk, and Curt., damping-off. Colo. 

 Echinodontium tinctorium Ell. and Ev., brown string}' rot. Utah, Mont., 



Idaho. 

 Forties officinalis Fr., reddish brown-rot. Mont. 

 F. pinicola Fr., brown crumbly rot. Western States. 

 F. roseus (Alb. and Schw.) Fr., brown pocket rot. Ariz., Wash. 

 Melampsora albertensis Arth., rust. Mont., Colo., Utah, Wash. 

 Phacidium infestans Karst,, needle blight. Idaho. 



Polyporus schweinitzii Fr., red-brown butt-rot. Mont., Idaho, Wash., Oreg. 

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

 Pythium debaryanum Hesse, damping-off. 

 Razoumofskya douglasii (Engelm.) O. Kuntze, mistletoe. Colo., Pacific 



Northwest. 

 Rhabdocline pseudotsugae Syd., needle cast. Oreg. 

 Sparassis radicata Weir, yellow root-rot. Mont., Pacific Northwest. 

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



Mont., Wyo., Idaho, Wash. 



PSIDIUM. 



P. guajava, guava. 



Clitocybe monadelpha (Morgan) Sacc, root-rot. Fla. 



Colletotrichum sp., die-back. Fla. 



Glomerella cingulata (Ston.) Spauld. and Schrenk, ripe-rot. Fla. 



PTELEA. 



P. trifoliata, hoptree. 



Cercospora afflata Wint., leaf -spot. Mo. 



C. pteleae Wint., leaf-spot. Ind., Mo. 



Phleospora pteleae Tharp. Utah. 



Puccinia windsoriae Schw., rust. Scatteringly throughout range of host* 



Septoria pteleae Ell. and Ev., leaf-spot. Ind. 



PUNICA. 



P. granatum, pomegranate. 



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



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



Sterigmatocystis castanea F. Patterson, fruit-rot. Tex., Ariz., Calif. 



PYRACANTHA. 



P. coccinea, scarlet firethorn. 



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

 blight. Idaho, Wash. 



PYRUS. 



P. communis, pear. 



Armillaria mellea (Vahl) Quel., root-rot. Pacific coast. 



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



B.), blight. General. 

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



and Town.) Com. S. A. B.), crown-gall. General. 

 Botryosphaeria ribis Gross, and Dug., black-rot. Va. 

 Botrytis sp., spur-blight. Oreg. 



B. cinerea Auct., fruit-rot. Wash. 



Cephalothecium roseum Cda., pink-mold rot. Conn., R. I., 111. 

 Cercospora minima Tr. and Earle, leaf-spot. Miss., Tex. 



C. piri Farl., leaf-spot. Mich. 



Corticium stevensii Burt (Hypochnus ochroleucus F. Noack), leaf-blight, 

 W. Va., N. C, S. C, Ga., Fla,, Ala., Tex. 



