IOWA ACADEMY OP SCIENCES. 
167 
practically certain that all of the Boestelia found in connection 
with these experiments was the Boestelia of G. macropus. 
Careful search was made in Mr. Hicks’ nursery and in orchards 
at Floral park and Queens, Long Island, but no Boestelia on 
cultivated apple was found anywhere on Long Island during 
the season of 1895, except at Flushing, where a few specimens 
were taken by Mr. F. A. Sirrine. 
The following table presents, in a condensed form, the 
results of the experiments on Long Island: 
Variety. 
Material 
USED.=^ 
Condition 
June 15. 
Condition 
June 29. 
Condition 
Aug. 21. 
Yellow i 
Transpar- < 
ent, i 
Iowa G. ma- 
cropus. 
N. Y. ditto. 
No Roestelia. 
ditto. 
No Roestelia. 
ditto. 
No Roestelia. 
ditto. 
Red J 
Astrachan, j 
Iowa G. ma- 
cropus. 
N. Y. ditto. 
Yellow spots on 
a few leaves, 
ditto 
No further devel- 
opment, 
ditto. 
No further devel- 
opment, 
ditto. 
Ben Davis, j 
Iowa G. ma- 
cropus. 
N. Y. ditto. 
Not observed, 
ditto. 
Yellow spots on 
a few leaves, 
ditto. 
No further devel- 
opment, 
ditto. 
Red Pippin, 1 
Iowa G. ma- 
cropus. 
N. Y. ditto. 
No Boestelia. 
ditto. 
No Boestelia. 
Roestelia appear- 
ing. 
No Boestelia. 
Partially devel- 
oped. 
Maiden’s j 
Blush. 1 
Iowa G. ma- 
cropus. 
Roestelia appear- 
ing. 
Continuing to 
develop. 
Aecidia well devel- 
oped. 
Wealthy, -j 
Iowa G. ma- 
cropus. 
Roestelia appear- 
ing. 
Continuing to 
develop. 
Aecidiawell devel- 
oped. 
* All inoculations with N. Y. G. macropus were made May 18. 
All inoculations with Iowa G. macropus were made May 24. 
The experiments at Ames, Iowa, were conducted at the 
Agricultural college. May 26, 1895, G. macropus, from New 
York, was inoculated on Yellow Transparent, Grimes’ Golden, 
Duchess of Oldenburg, Whitney’s No. 20 and Pirus coronaria. 
A large number of leaves on one tree of each were inoculated. 
In each case, some of the leaves were rubbed on both surfaces 
with the moistened cedar-apple horns, while others were inocu- 
lated by making punctures with a sterilized scalpel. On the 
same day, other trees of the same varieties were inoculated in 
the same manner with G. macropus collected in Iowa. All of 
the inoculations, except those on Pirus coronaria, failed. But 
the Pirus coronaria trees were so completely covered with Bocs- 
telia that scarcely a single perfect leaf could be found. What 
part of this was due to artificial inoculation and what part to 
natural inoculation it is impossible to say. It simply shows 
that the season was a favorable one for Boestelia. 
Our experiments at Ames are entirely in accord with these 
made by Doctor Halsted and Professor Pammel. Taken in 
