_- ———_—— wo oa” Ia 
AucusT 9, 1918] 
briefly upon some recent work upon biologie forms 
of stem rust. He stated that a new strain of Puc- 
cinia graminis had been sent in from Oregon which 
had proven to be different than any previously de- 
scribed. 
A general discussion followed concerning the 
general scope of the barberry campaign—the ad- 
visability of extending it into other states, ete. 
7:45 P.M., June 19—28 Present. 
Other Diseases of Wheat, Barley, Rye and Oats. 
—Dr. Johnson reported upon two distinet bacterial 
diseases of oats—one ‘‘halo blight’’ and the other 
striped bacterial disease. 
Black chaff bacterial disease of wheat was re- 
ported as occurring this year in various states and 
causing some damage. Bacterial diseases of bar- 
ley and rye, Septoria disease of wheat, Rhyncho- 
sporiwm disease of barley, anthracnose and Hel- 
minthosporium diseases were briefly discussed as 
to their distribution. This is not included here as 
such data are given by the Plant Disease Survey 
Reports. 
Dr. A. G. Johnson reported upon some dry heat 
experiments which seemed to promise to control cer- 
tain of these seed form diseases which are resistant 
to common methods of seed treatment. 
9:30 A.M., June 20—82 Present. 
Leaf Rusts of Cereals—Leaf rust of wheat and 
rye was reported as being extremely heavy and ex- 
tremely abundant in the south and as common in 
various sections. 
Dr. Melhus from Iowa reported Rhamnus lanceo- 
lata, a native buckthorn, heavily infected in Iowa, 
and stated that the crown rust of oats goes to this 
species of Rhamnus according to greenhouse tests. 
Some discussion followed regarding a method of 
determining losses by leaf rust. 
A short report of recent researches upon stripe 
rust was given by Mr. Hungerford. 
Species of Bunt and their Distribution —After 
some general discussion, an effort was made to 
learn by reports from those present, something re- 
garding the distribution of the two species of bunt. 
This did not result in any very satisfactory re- 
ports and Mr. Potter was finally appointed to look 
up the distribution of the two forms in various 
herbaria, 
Loose Smut of Wheat——This discussion brought 
out nothing which can not be learned from the 
Plant Disease Survey Reports. 
2 P.M., June 20. 
Field excursion to Wilson Farm (Experiment 
Station) in charge of Professors Jackson and 
Hoffer. 
SCIENCE 149 
7 P.M. Dinner followed by round-table discussion 
—40 Present. 
After the dinner, a rising vote of thanks was 
given to Dr. H. S. Jackson and Professor G. M. 
Hoffer for their hospitality and kindness in ar- 
ranging for the cereal disease meeting. 
At the business session Dr. G, H. Coons was 
chosen chairman and Dr. Robert Rands, secretary 
for the coming year. 
A committee consisting of Dr. Stakman, Dr. 
Johnson, Dr. Melhus and Professor Barss was ap- 
pointed to arrange for the time and place for the 
next meeting. 
Dr. Selby invited the conference to meet in Ohio 
and Dr, Anderson extended such an invitation from 
Illinois, 
Moved and carried that a committee upon reso- 
lutions be appointed—Anderson, Johnson, Stak- 
man and Whetzel appointed. 
Bacterial Diseases Bacterial diseases and corn 
rust were very briefly discussed. Professor Barre 
reported that Physoderma disease was one of the 
most troublesome and serious of all corn diseases. 
Distribution reported as practically over corn belt, 
although serious only farther south. A general dis- 
cussion of corn smut followed, 
9 A.M., June 21—86 Present. 
Dr. Haskell submitted for criticism and sugges- 
tions, blanks prepared by Dr. Lutman for use in 
cereal disease estimates in Vermont and adopted 
by the Plant Disease Survey for general use. Sev- 
eral minor suggestions were made. 
Smuts of Oats——A general round-table discus- 
sion followed as to the distribution of loose and 
covered smuts of oats. Mr. Potter was instructed 
to include oat smuts in the survey work of her- 
baria in regard to species of bunt. 
In the discussion which followed regarding 
barley smuts and stalk smut of rye, Dr. Coons 
urged that the treatment for rye smut be pushed 
so as to prevent its spread. Dr. Johnson raised the 
question regarding possible introduction of flag 
smut of wheat on wheat from Australia. It was 
moved and carried that the committee upon reso- 
lutions prepare resolutions to the Federal Horti- 
cultural Board in regard to use of wheat from 
Australia for seed purposes. 
Smut Eradication Campaign.—Report by Mr. 
Reddy of work in North and South Dakota indi- 
cated that the main value of work there was in se- 
euring treatment of barley and oats. 
Professor Barss reported that a standard label 
for use of druggists in Oregon had been prepared 
and distributed and that the campaign in Oregon 
