94 
in the District of Columbia and middle Georgia, and were received 
from California and Missouri. Some of these growths were as much as 
2 inches in diameter, i. e., much larger than the stem itself. Sorauer 
reports similar swellings on apple and pear trees, and ascribes them to 
mechanical injuries. 
PEACH ROSETTE. 
This disease is on the increase in Georgia, and its contagious nature 
has been settled beyond dispute.* Root grafts have been made to de¬ 
termine whether the contagion exists in all parts of the tree or only in 
the top. Cross inoculations have also been made, peach on plum and 
plum on peach, to determine experimentally whether the peach and the 
plum rosette are identical. Other experiments are in progress. 
PLUM BLIGHT. 
This disease (see Vol. vi, p. 108, of this Journal) has done less than 
the usual amount of damage in Georgia, but there have been some 
cases. 
PEAR DISEASES. 
The pear crop on the Delaware and Chesapeake peninsula was enor¬ 
mous and quite free from scab ( Fusicladium) and the spot disease due 
to j Entomosporium. Pear trees were in full bloom at Chestertown and 
Still Pond, Md., on April 19, and the lirst scab was found on May 3, 
when the young fruits were about one-fourth inch in diameter. Two 
hours search brought to light only twenty-five scabby fruits. During 
blossoming and immediately after, the weather was dry, and there were 
two cold, waves, April 24-26 and May 4-6. The records ot Dr. Max¬ 
well seem to show that pear scab has been abundant whenever there 
has been a combination of wet weather and high temperature during 
and immediately following the time of blossoming, and not trouble¬ 
some in other years. Should additional observations confirm this view, 
there is in it a hint as to the years when treatments for scab will be 
most necessary. 
The first Entomosporium spots were found on the leaves April 21. 
The damage in Maryland and Delaware in 1891 was confined principally 
to the leaves. These fell so early that many orchards blossomed and 
renewed their foliage in late autumn. The leaves of the Kieffer pear 
were not injured. This variety is noticeably resistant. 
With the exception of one orchard, there has been no pear blight f 
worth mentioning in the vicinity of Still Pond, Md., in five years. The 
large commercial orchards have been remarkably free from it. These 
* Additional Evidence on tlie Communicability of Peach Yellows and Peach Ro¬ 
sette. Government Printing Office, Washington, D. C., 1891. 
t Bacillus amylovorus (Burr.) De Toni. 
