58 INJURIOUS INSECTS OF I909 AND IQIO. 
On June 23d a radish plot was planted, containing eight rows, 
each 10% feet long. On July 14th the odd, or alternating rows 
in this plot were treated with tobacco-dust, the other rows being left 
as checks. On August 12th all the radishes of table size in this 
plot were pulled and their roots examined, with the following total 
results: 521 roots from the odd or treated rows; 309 roots from 
the even or check rows—this showing the fertilizing value of the 
tobacco radishes. In the case of the treated radishes, there were 
102 showing marks of maggots, and 419 without such marks, 
while of the check plants there were 51 showing maggot marks, 
and 258 which did not, which shows no advantage, from the mag- 
got standpoint, in the treatment. 
