82 BULLETIN 1347, U. S. DEPARTMENT OF AGRICULTURE 
_Tasre 5.—Distribution of miscellaneous wheat foot-rots in the United States— 
Continued 
Year State and county | Organism associated Collector Or eater deunee 
UTAH 
Ve oe ae 8 IMoOrganses= 2) Helminthosporium| B. L. Richards________ B. L. Richards. 
sp. 
SI OPD es eh os do: be. Saees Rhizoctonia sp______ eee (0 (0 ree ea Do. 
VIRGINIA 
510] Ques ere Page: 2026 eerts Winkn owen een DB rominesssse=s 
SO 1 Oma. < Rockingham ______|____- OS ASR Canes eee | ees ORS ee eae ae 
WASHINGTON 
1918-19._____|. "Thurston. =--29452 3 | ble Owe oes eee, County agent_________ 
LOTR ee SF Cowlitz a eee GORSES. 2 2 See ea |e COMER ee os Lo as 
1OTR¢- 2 een Snohomish sae==" | meas Gonna ee ee COLE en a 
1919-1923____| Spokane__________ Leptosphaeria her- | F. D. Heald and the | Mrs. E. S. Jones and 
potrichoides. writer. the writer. 
1093 Ree en lessee (6 Voce pa eS eee Wojnowicia grami- | H. Fellows___--.------ H. Fellows and the 
| nis. writer. 
SLOG wee | Wihatcomi=ss=22==s Umknowne see HD ea Eleald Bai 
Dana, and G. L 
} Zundell 
LOO oa Tse | Pilercesss ss22225 2% [sae (oe hea ene Pn Ota pias 22 ae oe ee 
SOLO Rearing Grays arbore-=—s ese GOs are Aes | RES Oe Ss 
PLO1UQRe>= es Se De wish ee en ne ee GO EG Bee el (i Vo yaaeaeeee > eee ET Ses ls 
“AGT ee ere Clarke: ss 2 ees Re GOL. es ey Pan | es COM Se eis Ronee 
SLOLQE Sauer ese Klickitatse.= 22 os=| Sees 0 Seine aaa Bowes GOL ee ae See 
For the past four years a severe foot-rot has occurred in the 
winter-wheat fields of Oklahoma. The writer has received many 
specimens of diseased plants from Robert Stratton, of the Oklahoma 
Agricultural Experiment Station, and from L. F. Locke, of the 
Woodward (Okla.) Field Station of the Office of Dry-Land Agri- 
culture Investigations, Bureau of Plant Industry, U. S. Department 
of Agriculture. In many cases plants have shown the symptoms of 
take-all, including a white-head condition, but thus far no perithe- 
cia of Ophiobolus graminis have been found. In 1923 a considerable 
quantity of diseased plant material from the vicinity of Woodward, 
Okla., was plated by the writer, and Helminthosporium sativum was 
obtained in a number of cases. In addition, an undescribed hypo- 
mycetous fungus, as previously reported (46), was also obtained 
from a limited number of diseased plants. Part of the trouble oc- 
curring in Oklahoma is attributable to H. sativum, but it seems 
rather doubtful whether this fungus is the only parasite involved. 
In many ways this trouble is similar to that occurring in parts of 
Kansas where O. graminis fruits sparsely and is found in combina- 
tion with H. sativum and other fungi. In a former publication 
the writer (46) pointed out that this previously undescribed fungus 
from Oklahoma is pathogenic on winter wheat. Under experimen- 
tal conditions the organism attacks the roots and the base of the 
stem, causing an injury similar to that produced by H. satewum. 
However, it seems doubtful whether this organism is an aggressive 
parasite. The exact relation of this fungus to the Oklahoma foot- 
rot can not be predicted, and it is not known how widely distributed 
this fungus may be. 
This fungus is named and described as follows: 
