1922] POOLE—FRUIT ROT 213 
treatments. It appears from the data given in this table that the 
disease was checked with wet Bordeaux and dust treatments. Such 
an interpretation is no doubt correct, but the difference of control 
on treated and untreated plots is not entirely due to treatments. 
There were slightly more diseased tomatoes on the untreated plots 
than were formed on the treated plots. The total yield was less 
on the untreated plots, because much of the fruit had prematurely 
ripened and was picked or had fallen. The calculation of the per- 
centages of the disease on the untreated plots with a smaller total 
of fruit on the ten check plants than was obtained from ten plants 
TABLE II 
SERIES I SERIES 2 SERIES 3 SERIES 4 
2 ; 2 2 
n 1 Beg 2 a Re} : on 2 : Ong 
WET SPRAY AND 38 Ses 3% gS. LE 423 33 gee 
DUST TREATMENTS aa |easel sa |Ssy¥eol ga 2880 Sa |2B8o 
=] a2 4 g 5 53 =| raf £ a. 
B2 jeged| 62 [S82] 88 |seee) G8 [zed 
= ao. ee) 
38 5° au 38 aes 38 zs Ee g8 hh a0 
Re A ONOCk i ce 166 4.2 rio |-3¥;8 r23 | 1075 130 2.3 
2. 3-0-3-50 192 1.5 142 2.8 116 9.0 168 2.4 
SAA $0. 6 211 2.9 124 0.8 193 2.0 184 3.2 
4. Dest 211 iG 128 t.5 193 2.0 236 .88 
5. 4-3-13-50. 193 is 140 0.7 134 4.5 211 95 
OG, Cheek ss. 154 3.6 90 8.8 159 6.3 180 3:3 
7+ 4-0-3-50. 157 a5 83 4.8 164 3.6 140 2.8 
8. 4-4-50...... 142 I.4 126 2.4 209 ° 175 1.7 
On NE es, 169 1.3 138 +5 154 » 185 2.1 
TO, pick ans 146 0.7 129 0.8 198 9.6 200 o.5 
on the treated plots, therefore, has resulted in a slightly increased 
percentage of disease in the check over the true percentage of con- 
trol. It will be noted in table II, however, that there is also a dif- 
ference of control in the four treatments, which indicates that some 
slight true control was obtain 
he treatments were clauned i in connection with the investiga- 
tion of Septoria lycopersici control. The third number in the wet 
Bordeaux spray represents fish oil soap. The dust was composed 
of 16 pounds anhydrous copper sulphate, 6 pounds lead arsenate, 
and 78 pounds of hydrated lime. The wet treatments were applied 
with a 3-row, 3-nozzle traction spray machine, while the dusts were 
applied with a hand duster. 
