Nov. 27,1916 
Claviceps paspali 
405 
were still poisonous and that a small amount of the extract of Claviceps 
paspali exposed to air and hot summer temperature was still active after 
a period of about 10 months. 
A guinea pig fed 40 grass spikelets daily for seven days, each con¬ 
taining a mass of Claviceps paspali tissue in the sphacelia, or honeydew, 
stagehand 60 each day for the next 36 days, showed no bad effects, but 
gained in weight. Another pig fed 25 young sclerotia daily for 7 days 
and 40 daily for the next 21 days showed no bad effects, but gained in 
weight slightly. This feeding was started on July 16. The last two 
experiments seem to indicate that it is only the old sclerotia that are 
poisonous. The experience of farmers with cattle on pastures indicates 
the same. 
Mowing pastures one or more times during the late summer or autumn, 
or as often as mature sclerotia become abundant, is an effective method 
of preventing poisoning, and is a measure of practical value in most 
places. 
