An Apricot Bright. 
11 
the cases of so-called “hold-over” blight in limbs and twigs must 
O <p 
be regarded as the sole means of keeping the disease alive over 
winter. The appearance of this apricot blight then should em¬ 
phasize the importance of keeping pear blight in check. All 
diseased trees whether they be apple, pear, apricot or pinm, should 
be looked over carefully in late fall or during the winter and all 
blighted limbs and twigs removed. When cutting out diseased 
branches, especially during the growing season, care should be 
taken to make the cut 8 or 10 inches below any evidence of dis¬ 
colored bark. 
DETAIL OF EXPERIMENTS. 
Experiment No. /. June 30; inoculated 12 apples with dis¬ 
eased tissue from apricot fruits. Apples on the tree and about 
one-fourth grown. Inoculations made with sterile instruments 
and diseased tissue taken from in under the skin from the zone of 
watery appearing tissue. The wounds were covered with sterile 
grafting wax as soon as the inoculations were made. Notes 
were taken on the development of the disease as follows: 
July 7. Inoculations have taken in four fruits. In one, disease has 
spread over one-fourth of the surface and a characteristic bead-like drop has 
formed on the surface. Four fruits destroyed by children. The other four 
show no signs of disease. July 11. Inoculations have taken in all of the apples. 
These apples were eventually entirely consumed by the disease. Five 
check apples punctured but not inoculated remained sound. 
Experiment No. 2 . On the same date, June 30, nine apple 
twigs in the same tree were inoculated with diseased tissue 
from apricot fruits as described above. All wounds were pro¬ 
tected with sterile grafting wax. 
July 7. Blight appearing on all of the twigs. Twigs brown and whither- 
ing with bead like droplets on surface. July 31, disease has spread 10 inches on 
one twig and eight inches on another. 
Experiment No. j. For the purpose of comparison seven 
twigs were inoculated June 30 with diseased tissue from a blight¬ 
ing apple limb. Bits of inner bark which was only slightly dis¬ 
colored by the disease weie inserted in incisions made in the tips 
of green twigs. 
July 7. Three twigs show no i esults. Four are diseased and show char¬ 
acteristic symptoms of pear blight, though the disease has not advanced as 
rapidly as it did in the twigs that were inoculated with tissue from apricot 
fruits. 
July 11. All the twigs in this experiment are now blighting and thick 
juice has formed in drops on the surface as in the other experiment. The gross 
appearance of the twigs in the two lots are the same and microscopical exami¬ 
nation shows that all diseased parts in both experiments are swarming with bac- 
