8 BULLETIN 28, PORTO RICO EXPERIMENT STATION. 
for which this locality was apparently not well adapted. Many 
spots on banana leaves were examined to determine whether they 
were caused by Stilbella but in no instance was a fruiting body 
found. 
OBSERVATIONS SUBSEQUENT TO CLEARING. 
On March 27, 1917, the station wrote the plantation owners as 
follows : 
Destroy absolutely every green plant in the experimental plat excepting 
shade trees, old coffee, and the bananas planted around it. Small coffee seed- 
lings should be destroyed because they are the most dangerous of all. It will 
probably be difficult to impress on the overseer the absolute necessity of getting 
rid of them. 
On April 17, 1917, two and a half months after clearing, the plat 
was inspected. No recent cleaning had been done and weeds were 
growing up. With the exception of two or three leaves on a wild 
plant, which showed doubtful spots but no fruiting bodies, no Stil- 
bella spots were seen. Shoots or renews from the coffee stumps were 
still very small, being only several inches high. On August 1, 1917, an- 
other request was made that the plat be cleaned. This was thoroughly 
done, and on August 21 the plat was inspected. The shoots from the 
coffee stumps were then from 1 to 3 feet high. More than 500 of them 
were carefully examined, but they showed no sign whatever of Stil- 
bella. 
In September the station sent to the plantation some coffee seed 
which the overseer was instructed to have planted at stakes in all 
vacant places. Instead of doing as directed, the overseer allowed the 
seed to be scattered closely in a small area. 
Another cleaning was requested on January 12, 1918, and the third 
inspection was made on January 26. The plat was weedy, not hav- 
ing been recently cleaned. More than 350 coffee renews were ex- 
amined, the whole plat, particularly the periphery being gone over 
very carefully. Only three trees, which were growing near the 
southwestern border, were found showing a few Stilbella-spotted 
leaves. At the end of a year less than 1 per cent of the trees showed 
any infection; that was only a slight one and near the edge of the 
plat where infection was to be expected. This showed the complete- 
ness with which this disease had been cleaned out. The diseased 
leaves were removed. 
On August 10, 1918, a request was made that the plat be well 
cleaned, and on September 13 the fourth inspection was made. The 
plat had not been cleaned and needed it very much. The coffee re- 
news appeared in excellent condition and had made good growth, 
an average tree being approximately 4 feet in height (PI. Ill, fig. 1). 
