INJURIOUS INSECTS OF 1909 AND IQIO. 57 
Plots 2 and 4 were treated on June roth, when all the plants 
were about three-fourths of an inch high, with tobacco sifted along 
the rows in considerable quantity, so as to surround the stems of 
all the plants. It took eight pounds of the tobacco-dust to treat 
each of these plots in this way. On June 13th these two plots 
were again treated. On July 2oth the radishes, which were of 
table size, were pulled, their roots examined and counted. Since 
the last treatment the maggots had apparently not been active. The 
untreated check plots were also pulled and the roots examined and 
counted on the same date: 
Pt tele ecce fer 755 entirely free, 489 marked by maggots. 
12110) Pott, (rec ene 952 entirely free, 299 marked by maggots. 
12 yor By orca 1,022 entirely free, 200 marked by maggots. 
PIOtAR ose ck 1,269 entirely free, 119 marked by maggots. 
This gives considerable evidence in favor of the tobacco treat- 
ment. 
Two plots of radishes were planted on June 4th. Plot 1 con- 
tained 14 rows, each 10% feet long, and plot 2, 15 rows, each 10% 
feet long. Plot 2 was used as a check, and plot 1 was treated on 
June 8th with a uniform coating of air-slaked lime. It was again 
similarly treated on June 15th. It was found that the treatment 
was not going to give any particular results as regards keeping off 
the maggots, particularly because the maggots were not very active 
at that. time. On July 19th radishes in both plots were pulled up, 
and those of table size were counted. This was to find out what 
effect the lime had on the growth of the radishes. The general 
appearance of the plots seemed to plainly indicate that the lime was 
detrimental to the radishes. It was found that plot 1 (the treated 
plot) contained 2,561 radishes of table size, and practically no small 
radishes were left after these were pulled and counted, while plot 2 
(the check plot) contained 2,814 radishes of table size, and many 
radishes were still left which were too small for the table, the 
count proving conclusively that the lime was detrimental. 
Plots of radishes were also treated with lime and oil of cloves, 
and with carbolic acid emulsion, and in every case the treatment was 
more or less, and in some cases, severely injurious. The radishes 
in all the plots of this season’s experiments were Early Scarlet 
Globe. 
