44 
FLORIDA STATE HORTICULTURAL SOCIETY. 
Table I. 
STEM-END ROT INFECTION ON ORANGES. 
Experiment No. 
1. Fungus filaments put on stem end. 
2. Fungus filaments put on clipper-cut rind. 
3. Spores of fungus put on stem end. 
4. Spores of fungus put on clipper-cut rind. 
5. No fungus put on stem end. 
6. No fungus put on clipper-cut rind. 
7. Withertip fungus put on stem end. 
8. Withertip fungus put on clipper cuts. 
9. Scaly bark fungus put on stem end. 
10. Scaly bark fungus put on clipper cuts. 
11. Gummosis (Diplodia) fungus put on stem end.. 
12. Gummosis (Diplodia) fungus put on clipper cuts 
Total 
Stem End Decay in 
5 Days. 
18 Days. 
23 Days. 
Per Cent. 
Per Cent. 
Per Cent, 
22 
66 
100 
100 
100 
100 
.00 
.00 
100 
.00 
100 
100 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
.00 
60 
80 
100 
100 
100 
(2) We wished to find out how readily 
fruit, lying on the soil in which there was 
stem-end rot fungus, would be infected. 
For this purpose 5 wooden boxes contain¬ 
ing soil were prepared as follows: (a) 
Soil from under an infected tree, (b) soil 
from Experiment Station grounds in 
which no citrus trees had been growing, 
same source sterilized and treated 
by mixing in cultures of stem-end 
rot fungus. Sound fruits were then 
placed stems clown in the soil, and it 
was kept moist. (See Table II.) 
The results of these experiments show 
that this fungus unlike the blue mold can 
enter without injury, but is favored by in¬ 
jury; that the time for decay, from the 
Table II. 
STEM-END ROT INFECTION ON ORANGES. 
Fruit Placed Stems Down on Soil. 
Total Stem End Decay After 
Experiment No. 5 Days. 13 Days. 22 Days. 31 Days. 
Per Cent. Per Cent. Per Cent. Per Cent. 
1. 
From under infected trees, Ormond, Fla. 
.00 
.00 
10 
20 
2. 
From Florida Experiment Station Grounds. 
.00 
.00 
.00 
.00 
3 - 
From Florida Experiment Station Grounds, plus fungus.. 
.00 
.00 
2.5 
5 
4 - 
From Florida Experiment Station Grounds, sterilized. 
.00 
.00 
.00 
.00 
5 - 
From Fla. Exp. Sta. Grounds, sterilized, plus fungus. 
.00 
5 
26 
42 
6. 
Check, fruit protected from soil. 
.00 
.00 
.00 
.00 
(c) soil from Experiment Station 
grounds in which cultures of fungus had 
been mixed, (d) soil from the same 
source sterilized, and (e) soil from the 
introduction of spores is greater than 
when filaments of the fungus are intro¬ 
duced, and that withertip and scaly bark 
fungus cannot produce stem end decay, 
