46 A PLANT-DISEASE SURVEY IX TEXAS. 



Each is bordered by a dark-brown or purplish zone beyond which is 

 an area of faint yellow. The mature spots have grayish centers. 



Specimens collected : Hempstead, 1487 ; Beeville, 1816 ; Luling. 2245 : Victoria, 

 233S: Alice. 2494: Nursery. 2-545: Stockdale. 2634: Flaronia. 2733: Yoakum, 

 2764; Hallettsville. 2903. 



Sooty mold (Oapnodium (?)). — The stems, petioles, and leaves 

 become covered over with a sooty, black coating, more abundant on 

 the older parts of the plant. On the late crop in some localities it- 

 results in the death of the entire plant. Probably the injury is 

 mostly due to plant lice and the fungus is merely secondary. Dark- 

 brown pycnidia 90 to 120 p are formed on the surface. The spores 

 are clear, elongated. 5 to 6 by 3 ,u. and stream out in tortuous, rope- 

 like strands. 



Specimens collected : Elgin. 2000 : Bastrop. 2048 : Cotulla. 2202. 



DISEASES OE CEREALS. 

 BARLEY. 



Covered smut {UstUago hordei (P.) Kellerm. and Swingle). — This 

 smut was present in considerable quantities in barley (Hordeum sp.) 

 grown near San Antonio in 1909. 1 



Loose smut (UstUago nuda (Jens.) Kellerm. and Swingle). — Bar- 

 ley is not grown as a field crop in the territory covered by this sur- 

 vey, and this material was collected from a plat on the University 

 campus. The brown spore masses occur on the spikelets. which fall 

 away, leaving only the naked rachilla. 



Specimens collected: Austin. 3099. 3118. 



Rust {Puccima grtamms P. var. hordei Freeman and Johnson). — 

 This rust was prevalent on barley near San Antonio in 1909. 1 



CORN. 



Rust (Puccinia sorgM S.). — This disease on corn [Zea mays L. | is 



quite general in its distribution but was not observed to be sufficiently 

 abundant to cause any serious loss except in one field of late com at 

 Flatonia. 



Specimens collected: Austin. 1557: Kerrville. 15S4 : Boerne. 1649: New 



Braunfels. 1679 : San Antonio. 17S2 : Elgin. 1S93 : San Marcos. 2102 : Gonzales. 

 2676: Flatonia. 2719: Yoakum. 2751. 



Smut ( UstUago zeae ( Beckm. ) I ng. ). — No loss of any consequence 



can be attributed to smut, as it was rarely found in abundance. At 

 Uvalde a field of corn was observed which had 40 to 50 per cent of the 

 ears destroyed, but in all other localities smut was rare. 



Specimens collected : Austin, 1450; Kerrville. 15S3: New Braunfels. 1709; 

 Uvalde. 1962 : Hondo. 1997 ; Cotulla. 2216 : Seguin. 2299 : Flatonia. 2720. 



1 Notes from E. C. Johnson, Bureau of Plant Industry. U. S. Dept. of Agriculture. 

 226 



