332 The Philippine Journal of Science 1922 
all. In other words, apparently there was a lessening of sus- 
ceptibility with increasing maturity.» The experiment was re- 
peated on fruits of the Valencia orange, using the same methods. 
TABLE 1.—Kesults of inoculation with Pseudomonas citri by twenty needle 
punctures on pineapple orange fruits of various degrees of maturity, 
as measured by their size. 
[Date of inoculation May 25, 1918; date of observation of results June 8, 1918.] 
Fruit. Results; infections. 
Not at 
Mo. | Dam Condition. gn ceo pune- 
mm. : Per cent.| Number. 
tesec: BP 255, Barone ean Se eee oe et os Fol an Sa 90 78 
Pius WS ee ee eerie eee See ee 100 (9) 
) ETE + gy PUL REG RS A Pe RS Stine Ge at Bat cote EE ee 100 41 
(cea Sy HERES SRS Ra EEE a IRS Tag ae ES 100 18 
Bik Et gee Bo ey ee SAA eS 100} =. ~30 
een Me ee eee ae i mae el ie fee 100 8 
y pov $F Gidea use ne ts ee 100 16 
, aoe OF feel ete eo ee 80 3 
reek OE fiero ae ee ie ee 2 90 6 
| ee re Oe ae tends Suede tec Sy egos 90 5 
ss Bs a 80 1 
5 Ree Be foe ote re ee er 80 1 
py BOSS Be aig Se. = 50 0 
yeas 50 ups silee sh apicc Gann ebnte wos cu uae pcb ee ocaced 80 0 
See 57 | Still green Ss 0 0 
pa Oi teases MO cca dcetosdess peed cae 5 0 
sve Bi Os ee ee b0 0 
no See Bl tox. do thts ca Oath ee ce bo 0 
fp ata 57 FE ee ee es ee ge ee 60 0 
a gt nee 68 ah as ha bk Oe ee bo 0 
ee 69 |/__..do ne oa 0 0 
® Numerous, 
; ®In these cases a reaction was produced as indicated by a yellow halo around the pune- 
prorat evertheless no excreseence was formed, and it could not be said that cankers were 
resen 
The results shown in Table 2 for the Valencia orange are in 
entire agreement with those shown in Table 1 on the pineapple 
orange. Plate 1 shows the difference in the results obtained 
from fruits of different degrees of maturity. 
The experiments were then continued in Nagasaki Prefecture, 
Japan, on fruits of the Washington navel orange. In this case, 
however, it was possible to carry out the experiments through- 
out the whole growing season. Fruits were inoculated at the 
time of the dropping of the petals in late May and early June, 
and thereafter at different periods during their development 
toward maturity. It was thus possible to use fruits of a known 
