38 BULLETIN 1366, U. S, DEPARTMENT OF AGRICULTURE 



COCOS. 



C. nucifera, coconut. 

 Alternaria sp., leaf-spot. Fla. 

 Colletotrichum sp., anthracnose. Fla. 

 Cytospora palmar um Cke., leaf -spot. Fla. 

 Diplodia epicocos Cke., stem-rot. Fla. 

 Fusarium sp., dry-rot. Fla. 



Gloeosporium nanoti Prill, and Del., anthracnose. Fla. 

 Pestalozzia palmar um Cke., leaf-spot. Fla. 

 Phytophthora faberi Maub., bud-rot. Fla. 

 Pythium sp., wilt. Fla. 

 Ramularia sp., leaf-spot. Fla. 

 Thielaviopsis paradoxa (DeSeyn.) Hoehn., root-rot. Fla. 



COFFEA. 



C. arabica, coffee. 



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



D. C. 

 Stilbum fla-jidum Cke., leaf-spot. Fla. 



COIOCASIA. 



C. esculenta, dasheen. 



Bacillus carotovorus L. R. Jones (Erwinia carotovora (Jones) Com. S. A. B.), 



soft-rot. Storage. 

 Diplodia spp., Java black-rot. Storage. 



Fusarium solani (Mart.) Sacc, associated with various rots. Fla. 

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

 Sclerotium rolfsii Sacc, storage rot. 



COMPTONIA. 



C. asplenifolia, sweetfern. 



Cronartium comptoniae Arth., rust. N. H., Vt., N.'Y. to N. C, Wis. 

 CORNUS. 



Cornus spp., dogwood. 



Ascochyta cornicola Sacc, leaf-spot. Ohio, Wis. 



Botrytis sp., twig-blight. Pa. 



Cercospora cornicola Tr. and Earle, leaf-spot. Ga., Fla., Miss., Tex. 



Diaporthe albocarnis Ell. and Ev., canker. Colo. 



Dimerosporium pulchrum Sacc, sooty mold. Miss., Tex., 111., Iowa. 



Microsphaera alni (Wallr.) Wint., powdery mildew. Frequent in North- 

 eastern States. 



Myxosporium nitidum Berk, and Curt., twig-blight. Frequent in North- 

 eastern States. 



Phoma corni Fckl., canker. Minn. 



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



Phyllosticta corni West., leaf-spot. W. Va. 



P. globifera Ell. and Ev., leaf-spot. Kans. 



Physalospora corni Ell. and Ev. Colo. 



Septoria cornicola Desm., leaf-spot. General. 

 C. florida, flowering dogwood. 



Cercospora cornicola Tr. and Earle, leaf-spot. Miss. 



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

 rot. Tex. 



Phyllactinia corylea (Pers.) Karst., powdery mildew. S. C, Ala., Ind., 

 111., Iowa. 



Phyllosticta globifera Ell. and Ev., leaf-spot. Del., W. Va. 



P. starbaeckii Sacc. and Syd., leaf-spot. Pa. 



Septoria cornicola Desm., leaf-spot. Pa., S. C, Ind., Ky. 

 C. nuttalli, Pacific dogwood. 



Fomes igniarius Fr., white wood-rot. 



Nectria galligena Bres., European canker. Wash., Oreg. 



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



